crowdsource-backend/logs/crowdsource-backend.log.2021-04-30.log

09:57:58.669 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=167MB 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
09:57:58.814 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=340MB 
09:57:58.857 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:57:58.865 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@52b6319f 
09:57:58.891 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:57:58.992 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:57:59.003 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:57:59.113 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61746, server: 101.37.175.111/101.37.175.111:2181 
09:57:59.177 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd44, negotiated timeout = 40000 
09:57:59.192 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:01.856 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:01.876 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
09:58:02.426 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
09:58:02.448 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 18ms. Found 0 repository interfaces. 
09:58:02.580 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
09:58:02.732 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:03.007 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
09:58:03.025 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
09:58:03.025 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
09:58:03.113 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
09:58:03.113 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1230 ms 
09:58:03.376 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
09:58:03.414 [cluster-ClusterId{value='608b642b6adc049c54f48baf', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:110}] to localhost:27017 
09:58:03.417 [cluster-ClusterId{value='608b642b6adc049c54f48baf', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1846016} 
09:58:03.693 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:111}] to localhost:27017 
09:58:03.913 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
09:58:03.914 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
09:58:03.917 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
09:58:03.917 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
09:58:04.073 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
09:58:04.230 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
09:58:04.441 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
09:58:04.486 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
09:58:04.588 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.339 seconds (JVM running for 11.963) 
09:58:04.697 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:04.713 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:04.714 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@1fe201ad 
09:58:04.714 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:04.714 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:04.714 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:04.771 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61790, server: 101.37.175.111/101.37.175.111:2181 
09:58:04.853 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd45, negotiated timeout = 40000 
09:58:04.853 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:07.569 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:07.586 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:07.593 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.941 seconds (JVM running for 14.967) 
09:58:07.594 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:07.667 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd45 closed 
09:58:07.667 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd45 
09:58:07.683 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:07.716 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:07.731 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:07.732 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@6f97e225 
09:58:07.732 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:07.732 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:07.732 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:07.787 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61812, server: 101.37.175.111/101.37.175.111:2181 
09:58:07.853 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd46, negotiated timeout = 40000 
09:58:07.853 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:09.488 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:09.489 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:09.489 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:09.489 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:10.573 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:10.585 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:10.592 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.909 seconds (JVM running for 17.966) 
09:58:10.592 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:10.659 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd46 closed 
09:58:10.660 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd46 
09:58:10.687 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:10.752 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:10.778 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:10.778 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@495e221b 
09:58:10.779 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:10.779 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:10.779 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:10.842 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61840, server: 101.37.175.111/101.37.175.111:2181 
09:58:10.917 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd47, negotiated timeout = 40000 
09:58:10.917 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:13.635 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:13.645 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:13.650 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.961 seconds (JVM running for 21.025) 
09:58:13.651 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:13.714 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd47 closed 
09:58:13.715 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd47 
09:58:13.731 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:13.766 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
09:58:13.766 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
09:58:13.774 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 8 ms 
09:58:13.782 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:13.796 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:13.796 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5547da41 
09:58:13.796 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:13.797 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:13.797 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:13.842 [http-nio-8090-exec-2] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:3, serverValue:112}] to localhost:27017 
09:58:13.906 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61869, server: 101.37.175.111/101.37.175.111:2181 
09:58:13.987 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd48, negotiated timeout = 40000 
09:58:13.987 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:14.493 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:14.493 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:14.493 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:14.494 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:18.022 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:18.043 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:18.053 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 4.32 seconds (JVM running for 25.427) 
09:58:18.053 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:18.126 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd48 
09:58:18.126 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd48 closed 
09:58:18.143 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:18.177 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:18.190 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:18.191 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@3c8e5d61 
09:58:18.191 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:18.191 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:18.191 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:18.249 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61906, server: 101.37.175.111/101.37.175.111:2181 
09:58:18.329 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd49, negotiated timeout = 40000 
09:58:18.329 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:19.497 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:19.497 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:19.497 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:19.498 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:21.080 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:21.088 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:21.092 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.948 seconds (JVM running for 28.467) 
09:58:21.093 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:21.158 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd49 closed 
09:58:21.158 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd49 
09:58:21.171 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:21.201 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:21.212 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:21.212 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5ca1a9ed 
09:58:21.212 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:21.213 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:21.213 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:21.272 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61931, server: 101.37.175.111/101.37.175.111:2181 
09:58:21.346 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4a, negotiated timeout = 40000 
09:58:21.346 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:24.261 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:24.268 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:24.273 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.101 seconds (JVM running for 31.647) 
09:58:24.273 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:24.336 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4a closed 
09:58:24.336 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4a 
09:58:24.349 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:24.382 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:24.393 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:24.393 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@529d95f6 
09:58:24.393 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:24.393 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:24.393 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:24.445 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61953, server: 101.37.175.111/101.37.175.111:2181 
09:58:24.501 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:24.501 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:24.502 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:24.502 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:24.555 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4b, negotiated timeout = 40000 
09:58:24.555 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:27.437 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:27.448 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:27.455 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.105 seconds (JVM running for 34.829) 
09:58:27.455 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:27.519 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4b closed 
09:58:27.519 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4b 
09:58:27.531 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:27.560 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:27.570 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:27.570 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@30e8d803 
09:58:27.570 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:27.571 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:27.571 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:27.637 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61977, server: 101.37.175.111/101.37.175.111:2181 
09:58:28.140 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4c, negotiated timeout = 40000 
09:58:28.140 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:29.506 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:29.506 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:29.507 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:29.507 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:30.878 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:30.889 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:30.894 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.362 seconds (JVM running for 38.269) 
09:58:30.895 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:30.952 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4c closed 
09:58:30.952 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4c 
09:58:30.966 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:31.006 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:31.018 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:31.018 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@57fc1723 
09:58:31.018 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:31.019 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:31.019 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:31.079 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62004, server: 101.37.175.111/101.37.175.111:2181 
09:58:31.159 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4d, negotiated timeout = 40000 
09:58:31.159 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:33.927 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:33.939 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:33.946 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.979 seconds (JVM running for 41.321) 
09:58:33.947 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:33.999 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4d closed 
09:58:33.999 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4d 
09:58:34.015 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:34.052 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:34.064 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:34.064 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@40527cd0 
09:58:34.064 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:34.064 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:34.065 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:34.120 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62025, server: 101.37.175.111/101.37.175.111:2181 
09:58:34.203 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4e, negotiated timeout = 40000 
09:58:34.203 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:34.507 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:34.507 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:34.508 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:34.508 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:36.839 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:36.848 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:36.854 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.838 seconds (JVM running for 44.229) 
09:58:36.855 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:36.912 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4e closed 
09:58:36.912 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4e 
09:58:36.924 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:36.953 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:36.963 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:36.964 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@28a8a73c 
09:58:36.964 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:36.964 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:36.964 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:37.027 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62055, server: 101.37.175.111/101.37.175.111:2181 
09:58:37.092 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd4f, negotiated timeout = 40000 
09:58:37.093 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:39.510 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:39.510 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:39.510 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:39.510 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:39.829 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:39.840 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:39.845 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.92 seconds (JVM running for 47.22) 
09:58:39.846 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:39.913 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd4f closed 
09:58:39.913 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd4f 
09:58:39.927 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:39.958 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:39.968 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:39.968 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@521a5944 
09:58:39.968 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:39.968 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:39.968 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:40.037 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62078, server: 101.37.175.111/101.37.175.111:2181 
09:58:40.113 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd50, negotiated timeout = 40000 
09:58:40.113 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:42.829 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:42.839 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:42.844 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.916 seconds (JVM running for 50.219) 
09:58:42.845 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:42.909 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd50 closed 
09:58:42.909 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd50 
09:58:42.924 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:42.955 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:42.965 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:42.965 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5ac8a1fe 
09:58:42.965 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:42.965 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:42.965 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:43.034 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62097, server: 101.37.175.111/101.37.175.111:2181 
09:58:43.108 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd51, negotiated timeout = 40000 
09:58:43.109 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:44.513 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:44.513 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:44.513 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:44.513 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:45.856 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:45.867 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:45.872 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.947 seconds (JVM running for 53.247) 
09:58:45.873 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:45.935 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd51 closed 
09:58:45.935 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd51 
09:58:45.948 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:45.980 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:45.991 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:45.991 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@724a0b22 
09:58:45.991 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:45.992 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:45.992 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:46.049 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62120, server: 101.37.175.111/101.37.175.111:2181 
09:58:46.121 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd52, negotiated timeout = 40000 
09:58:46.121 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:48.766 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:48.776 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:48.781 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.832 seconds (JVM running for 56.156) 
09:58:48.782 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:48.842 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd52 closed 
09:58:48.842 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd52 
09:58:48.856 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:48.887 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:48.897 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:48.897 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@1590fbce 
09:58:48.897 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:48.898 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:48.898 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:48.957 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62139, server: 101.37.175.111/101.37.175.111:2181 
09:58:49.039 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd53, negotiated timeout = 40000 
09:58:49.039 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:49.518 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:49.518 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:49.519 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:49.519 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:51.735 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:51.745 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:51.751 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.894 seconds (JVM running for 59.125) 
09:58:51.751 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:51.815 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd53 closed 
09:58:51.815 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd53 
09:58:51.829 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:51.861 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:51.871 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:51.871 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@4a2edd1b 
09:58:51.871 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:51.871 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:51.871 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:51.928 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62162, server: 101.37.175.111/101.37.175.111:2181 
09:58:51.993 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd54, negotiated timeout = 40000 
09:58:51.993 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:54.519 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:58:54.521 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:54.521 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:54.521 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:54.522 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:54.528 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:58:54.534 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.704 seconds (JVM running for 61.908) 
09:58:54.534 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:58:54.600 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd54 closed 
09:58:54.600 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd54 
09:58:54.614 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:58:54.644 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:58:54.653 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:58:54.653 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@423d1cad 
09:58:54.653 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:58:54.653 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:58:54.654 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:58:54.707 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62179, server: 101.37.175.111/101.37.175.111:2181 
09:58:54.777 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd55, negotiated timeout = 40000 
09:58:54.777 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:58:59.526 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:58:59.538 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:59.560 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:58:59.561 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:01.268 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:59:01.276 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:59:01.281 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 6.666 seconds (JVM running for 68.655) 
09:59:01.281 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:59:01.346 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd55 closed 
09:59:01.346 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd55 
09:59:01.357 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:59:01.384 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7563d027] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
09:59:01.394 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
09:59:01.394 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5ee13dc7 
09:59:01.394 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
09:59:01.394 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
09:59:01.395 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
09:59:01.453 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62232, server: 101.37.175.111/101.37.175.111:2181 
09:59:01.525 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd56, negotiated timeout = 40000 
09:59:01.525 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
09:59:04.493 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
09:59:04.502 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
09:59:04.507 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.149 seconds (JVM running for 71.881) 
09:59:04.508 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
09:59:04.564 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:04.565 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:04.565 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:04.565 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:04.583 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd56 closed 
09:59:04.583 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd56 
09:59:04.596 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
09:59:09.571 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:09.571 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:09.571 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:09.571 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:14.573 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:14.573 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:14.573 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:14.573 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:19.579 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:19.579 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:19.580 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:19.580 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:24.584 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:24.584 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:24.584 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:24.584 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:29.590 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:29.590 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:29.590 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:29.590 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:34.594 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:34.594 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:34.594 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:34.594 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:39.599 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:39.600 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:39.600 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:39.600 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:44.601 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:44.602 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:44.602 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:44.602 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:49.604 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:49.604 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:49.604 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:49.604 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:54.610 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:54.611 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:54.611 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:54.611 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:59.614 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
09:59:59.614 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:59.614 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
09:59:59.615 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:04.616 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:04.616 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:04.616 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:04.616 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:09.620 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:09.620 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:09.620 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:09.620 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:14.625 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:14.625 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:14.625 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:14.625 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:19.628 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:19.628 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:19.628 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:19.628 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:24.633 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:24.633 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:24.634 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:24.634 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:29.639 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:29.639 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:29.639 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:29.639 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:34.645 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:34.645 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:34.645 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:34.645 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:39.651 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:39.651 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:39.651 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:39.651 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:44.657 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:44.657 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:44.657 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:44.658 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:49.663 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:49.663 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:49.663 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:49.664 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:54.668 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:54.668 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:54.668 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:54.668 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:59.672 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:00:59.672 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:59.672 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:00:59.673 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:04.678 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:04.678 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:04.678 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:04.678 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:09.682 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:09.682 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:09.685 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:09.685 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:14.689 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:14.689 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:14.689 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:14.690 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:19.695 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:19.695 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:19.695 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:19.695 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:24.697 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:24.697 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:24.698 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:24.698 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:29.702 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:29.702 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:29.702 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:29.703 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:34.703 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:34.704 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:34.704 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:34.704 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:39.706 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:39.706 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:39.707 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:39.707 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:44.708 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:44.708 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:44.708 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:44.709 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:49.714 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:49.714 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:49.715 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:49.715 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:54.719 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:54.719 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:54.719 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:54.720 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:59.725 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:01:59.725 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:59.725 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:01:59.725 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:04.731 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:04.740 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:04.740 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:04.740 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:09.744 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:09.744 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:09.745 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:09.745 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:14.748 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:14.749 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:14.749 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:14.749 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:19.752 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:19.752 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:19.752 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:19.752 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:24.758 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:24.758 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:24.759 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:24.759 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:29.762 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:29.762 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:29.762 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:29.762 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:34.768 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:34.768 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:34.768 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:34.768 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:39.773 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:39.773 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:39.773 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:39.773 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:44.778 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:44.778 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:44.778 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:44.779 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:49.783 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:49.783 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:49.783 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:49.783 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:54.788 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:54.788 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:54.788 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:54.788 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:59.792 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:02:59.792 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:59.792 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:02:59.792 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:04.796 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:04.796 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:04.796 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:04.796 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:09.797 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:09.798 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:09.798 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:09.798 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:14.801 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:14.801 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:14.801 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:14.801 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:19.805 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:19.806 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:19.806 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:19.806 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:24.811 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:24.812 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:24.812 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:24.812 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:29.815 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:29.815 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:29.815 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:29.816 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:34.816 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:34.817 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:34.817 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:34.817 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:39.817 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:39.818 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:39.819 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:39.819 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:44.820 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:44.820 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:44.821 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:44.821 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:49.825 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:49.826 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:49.826 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:49.826 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:54.827 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:54.827 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:54.828 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:54.828 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:59.829 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:03:59.829 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:59.830 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:03:59.830 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:04.834 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:04.835 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:04.835 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:04.835 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:09.837 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:09.837 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:09.837 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:09.838 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:14.842 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:14.842 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:14.842 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:14.842 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:19.847 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:19.848 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:19.848 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:19.848 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:24.849 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:24.849 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:24.849 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:24.849 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:29.855 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:29.855 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:29.855 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:29.855 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:34.861 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:34.861 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:34.861 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:34.861 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:39.867 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:39.867 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:39.867 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:39.867 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:44.872 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:44.872 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:44.873 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:44.873 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:49.876 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:49.877 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:49.877 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:49.877 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:54.881 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:54.881 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:54.882 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:54.882 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:59.884 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:04:59.885 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:59.885 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:04:59.885 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:04.891 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:04.891 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:04.891 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:04.891 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:09.895 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:09.895 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:09.895 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:09.895 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:14.899 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:14.899 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:14.900 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:14.900 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:19.904 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:19.905 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:19.905 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:19.905 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:24.910 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:24.910 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:24.911 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:24.911 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:29.913 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:29.913 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:29.913 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:29.913 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:34.915 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:34.915 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:34.915 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:34.915 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:39.917 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:39.918 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:39.918 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:39.918 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:44.921 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:44.921 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:44.921 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:44.921 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:49.926 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:49.926 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:49.926 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:49.926 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:54.928 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:54.928 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:54.928 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:54.928 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:59.929 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:05:59.929 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:59.929 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:05:59.930 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:04.933 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:04.933 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:04.933 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:04.933 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:09.937 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:09.937 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:09.938 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:09.938 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:14.939 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:14.939 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:14.939 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:14.939 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:19.945 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:19.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:19.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:19.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:24.950 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:24.951 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:24.951 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:24.951 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:29.955 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:29.956 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:29.956 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:29.957 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:34.962 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:34.962 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:34.962 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:34.962 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:39.964 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:39.964 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:39.965 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:39.965 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:44.968 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:44.968 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:44.968 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:44.968 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:49.972 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:49.972 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:49.972 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:49.972 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:54.976 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:54.977 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:54.977 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:54.977 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:59.980 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:06:59.980 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:59.980 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:06:59.980 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:04.985 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:04.985 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:04.985 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:04.985 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:09.988 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:09.988 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:09.988 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:09.988 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:14.993 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:14.993 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:14.993 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:14.993 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:19.998 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:19.998 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:19.998 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:19.999 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:25.000 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:25.000 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:25.000 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:25.000 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:30.004 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:30.005 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:30.005 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:30.005 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:35.006 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:35.006 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:35.006 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:35.006 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:40.010 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:40.011 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:40.011 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:40.011 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:45.014 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:45.014 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:45.014 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:45.014 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:50.018 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:50.018 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:50.018 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:50.018 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:55.022 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:07:55.022 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:55.023 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:07:55.023 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:00.026 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:00.026 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:00.026 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:00.026 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:05.032 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:05.032 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:05.032 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:05.032 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:10.035 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:10.036 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:10.036 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:10.036 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:15.038 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:15.038 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:15.038 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:15.038 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:20.039 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:20.039 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:20.039 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:20.039 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:25.041 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:25.041 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:25.042 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:25.042 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:30.046 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:30.046 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:30.047 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:30.047 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:35.051 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:35.052 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:35.052 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:35.052 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:40.054 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:40.056 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:40.057 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:40.057 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:45.063 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:45.063 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:45.063 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:45.063 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:50.070 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:50.070 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:50.070 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:50.070 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:55.075 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:08:55.075 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:55.075 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:08:55.075 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:00.078 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:00.080 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:00.080 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:00.080 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:05.085 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:05.085 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:05.086 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:05.086 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:10.089 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:10.089 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:10.089 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:10.089 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:15.092 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:15.092 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:15.092 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:15.092 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:20.097 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:20.097 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:20.097 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:20.098 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:25.103 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:25.103 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:25.103 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:25.104 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:30.108 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:30.108 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:30.108 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:30.108 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:35.112 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:35.112 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:35.112 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:35.112 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:40.113 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:40.113 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:40.113 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:40.113 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:45.119 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:45.119 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:45.119 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:45.119 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:50.125 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:50.125 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:50.125 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:50.125 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:55.129 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:09:55.129 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:55.129 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:09:55.129 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:00.133 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:00.134 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:00.135 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:00.136 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:05.138 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:05.138 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:05.138 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:05.138 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:10.145 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:10.146 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:10.147 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:10.148 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:15.153 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:15.154 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:15.154 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:15.154 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:20.160 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:20.160 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:20.160 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:20.161 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:25.164 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:25.164 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:25.164 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:25.164 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:30.169 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:30.170 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:30.170 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:30.170 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:35.171 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:35.171 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:35.172 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:35.172 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:40.178 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:40.179 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:40.179 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:40.179 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:45.183 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:45.184 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:45.184 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:45.184 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:50.188 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:50.188 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:50.188 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:50.188 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:55.189 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:10:55.190 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:55.190 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:55.190 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:10:58.709 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:10:58.709 [Thread-34] INFO  com.alibaba.nacos.client.naming - [BEAT] removing beat: DEFAULT_GROUP@@mooctest-crowdsource-backend:192.168.43.121:8090 from beat map. 
10:10:58.709 [Thread-34] INFO  com.alibaba.nacos.client.naming - [DEREGISTER-SERVICE] public deregistering service DEFAULT_GROUP@@mooctest-crowdsource-backend with instance: {"clusterName":"DEFAULT","enabled":true,"ephemeral":true,"healthy":true,"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ip":"192.168.43.121","ipDeleteTimeout":30000,"metadata":{},"port":8090,"weight":1.0} 
10:10:58.711 [Thread-34] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance?namespaceId=public&port=8090&clusterName=DEFAULT&ip=192.168.43.121&ephemeral=true&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8 from 127.0.0.1 
10:10:58.711 [Thread-34] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:89)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:10:58.711 [Thread-34] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:10:58.711 [Thread-34] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:10:58.711 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:10:58.712 [Thread-34] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:10:58.715 [Thread-34] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:111}] to localhost:27017 because the pool has been closed. 
10:10:58.716 [Thread-34] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:3, serverValue:112}] to localhost:27017 because the pool has been closed. 
10:11:10.514 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1a7c6992] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=306MB 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:11:10.739 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=500MB 
10:11:10.756 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:11:10.760 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@61799544 
10:11:10.768 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:11:10.822 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:11:10.829 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:11:10.909 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:50876, server: 101.37.175.111/101.37.175.111:2181 
10:11:10.972 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd5b, negotiated timeout = 40000 
10:11:10.979 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:11:13.993 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:11:14.012 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:11:14.452 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:11:14.483 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 18ms. Found 0 repository interfaces. 
10:11:14.621 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:11:14.774 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1a7c6992] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:11:14.995 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:11:15.011 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:11:15.011 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:11:14.843 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:11:14.844 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 825 ms 
10:11:15.114 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:11:15.154 [cluster-ClusterId{value='608b67436adc049dccac0582', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:113}] to localhost:27017 
10:11:15.159 [cluster-ClusterId{value='608b67436adc049dccac0582', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1908937} 
10:11:15.393 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:114}] to localhost:27017 
10:11:15.664 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:11:15.664 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:11:15.667 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:11:15.667 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:11:15.792 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:11:15.917 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:11:16.118 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:11:16.272 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:11:16.274 [main] INFO  edu.nju.BugApplication - Started BugApplication in 7.04 seconds (JVM running for 12.529) 
10:12:31.944 [Thread-35] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:12:31.946 [Thread-35] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:12:31.946 [Thread-35] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:12:31.947 [Thread-35] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:12:31.952 [Thread-35] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:114}] to localhost:27017 because the pool has been closed. 
10:12:43.141 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$a6843b2d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=409MB 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:12:43.251 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=597MB 
10:12:43.261 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:12:43.264 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@3be4f71 
10:12:43.270 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:12:43.321 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:12:43.326 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:12:43.461 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:51514, server: 101.37.175.111/101.37.175.111:2181 
10:12:43.538 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd5c, negotiated timeout = 40000 
10:12:43.543 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:12:46.626 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:12:46.644 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:12:46.966 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:12:46.983 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 15ms. Found 0 repository interfaces. 
10:12:47.093 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:12:47.193 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$a6843b2d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:12:47.362 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:12:47.378 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:12:47.378 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:12:47.460 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:12:47.461 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 810 ms 
10:12:47.658 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:12:47.691 [cluster-ClusterId{value='608b679f6adc049e173f8daa', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:115}] to localhost:27017 
10:12:47.694 [cluster-ClusterId{value='608b679f6adc049e173f8daa', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1817025} 
10:12:47.956 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:116}] to localhost:27017 
10:12:48.181 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:12:48.181 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:12:48.184 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:12:48.184 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:12:48.326 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:12:48.464 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:12:48.689 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:12:48.837 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:12:48.839 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.104 seconds (JVM running for 11.53) 
10:15:32.282 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
10:15:32.282 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
10:15:32.289 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 7 ms 
10:17:42.576 [http-nio-8090-exec-9] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:3, serverValue:117}] to localhost:27017 
10:24:55.537 [Thread-32] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:24:55.539 [Thread-32] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:24:55.539 [Thread-32] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:24:55.539 [Thread-32] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:24:55.545 [Thread-32] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:116}] to localhost:27017 because the pool has been closed. 
10:24:55.545 [Thread-32] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:3, serverValue:117}] to localhost:27017 because the pool has been closed. 
10:25:05.292 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=157MB 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:25:05.405 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=332MB 
10:25:05.417 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:05.420 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5f13be1 
10:25:05.427 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:05.474 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:05.480 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:05.579 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56610, server: 101.37.175.111/101.37.175.111:2181 
10:25:05.654 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd5f, negotiated timeout = 40000 
10:25:05.659 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:10.550 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:10.571 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:25:10.973 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:25:10.992 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 16ms. Found 0 repository interfaces. 
10:25:11.113 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:25:11.230 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:11.420 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:25:11.436 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:25:11.436 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:25:11.520 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:25:11.521 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 944 ms 
10:25:11.718 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:25:11.751 [cluster-ClusterId{value='608b6a876adc049f6660e772', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:118}] to localhost:27017 
10:25:11.755 [cluster-ClusterId{value='608b6a876adc049f6660e772', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2139067} 
10:25:11.969 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:119}] to localhost:27017 
10:25:12.176 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:25:12.176 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:25:12.178 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:25:12.178 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:25:12.313 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:25:12.530 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:25:12.789 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:25:12.867 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:25:12.870 [main] INFO  edu.nju.BugApplication - Started BugApplication in 7.982 seconds (JVM running for 12.956) 
10:25:13.304 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:13.321 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:13.321 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@207a6d77 
10:25:13.322 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:13.322 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:13.322 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:13.374 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56665, server: 101.37.175.111/101.37.175.111:2181 
10:25:13.435 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd60, negotiated timeout = 40000 
10:25:13.435 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:20.617 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:20.639 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:20.649 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 7.389 seconds (JVM running for 20.735) 
10:25:20.651 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:20.728 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd60 
10:25:20.728 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd60 closed 
10:25:20.757 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:20.818 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:20.845 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:20.846 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@34da449e 
10:25:20.846 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:20.846 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:20.847 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:20.909 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56718, server: 101.37.175.111/101.37.175.111:2181 
10:25:20.987 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd61, negotiated timeout = 40000 
10:25:20.987 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:22.877 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:22.878 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:22.878 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:22.878 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:23.793 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:23.804 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:23.810 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.051 seconds (JVM running for 23.897) 
10:25:23.811 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:23.887 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd61 closed 
10:25:23.887 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd61 
10:25:23.902 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:23.936 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:23.950 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:23.951 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@41486eb0 
10:25:23.951 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:23.951 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:23.951 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:24.006 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56741, server: 101.37.175.111/101.37.175.111:2181 
10:25:24.067 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd62, negotiated timeout = 40000 
10:25:24.075 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:27.018 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:27.050 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:27.066 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.163 seconds (JVM running for 27.152) 
10:25:27.067 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:27.141 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd62 closed 
10:25:27.141 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd62 
10:25:27.181 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:27.267 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:27.295 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:27.296 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@18ec4115 
10:25:27.297 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:27.298 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:27.298 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:27.375 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56760, server: 101.37.175.111/101.37.175.111:2181 
10:25:27.446 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd63, negotiated timeout = 40000 
10:25:27.446 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:27.879 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:27.892 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:27.894 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:27.915 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:30.217 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:30.328 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:30.384 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.2 seconds (JVM running for 30.47) 
10:25:30.388 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:30.459 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd63 closed 
10:25:30.459 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd63 
10:25:30.475 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:30.570 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:30.621 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:30.621 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@5d4886c3 
10:25:30.621 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:30.622 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:30.622 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:30.688 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56787, server: 101.37.175.111/101.37.175.111:2181 
10:25:30.757 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd64, negotiated timeout = 40000 
10:25:30.757 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:32.922 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:32.923 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:32.924 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:32.924 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:33.367 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:33.387 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:33.396 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.92 seconds (JVM running for 33.482) 
10:25:33.397 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:33.463 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd64 
10:25:33.463 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd64 closed 
10:25:33.487 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:33.567 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:33.583 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:33.584 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@1bc0cfdd 
10:25:33.584 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:33.584 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:33.584 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:33.646 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56807, server: 101.37.175.111/101.37.175.111:2181 
10:25:33.725 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd65, negotiated timeout = 40000 
10:25:33.725 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:36.594 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:36.604 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:36.609 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.121 seconds (JVM running for 36.695) 
10:25:36.610 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:36.670 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd65 closed 
10:25:36.670 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd65 
10:25:36.686 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:36.729 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:36.741 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:36.741 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@50d3a608 
10:25:36.742 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:36.742 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:36.742 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:36.809 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56829, server: 101.37.175.111/101.37.175.111:2181 
10:25:36.899 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd66, negotiated timeout = 40000 
10:25:36.900 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:37.932 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:37.932 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:37.933 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:37.933 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:40.694 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:40.702 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:40.708 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 4.022 seconds (JVM running for 40.794) 
10:25:40.709 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:40.781 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd66 closed 
10:25:40.781 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd66 
10:25:40.794 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:40.822 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:40.832 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:40.832 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@63c96927 
10:25:40.832 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:40.833 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:40.833 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:40.897 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56859, server: 101.37.175.111/101.37.175.111:2181 
10:25:40.974 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd67, negotiated timeout = 40000 
10:25:40.975 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:42.934 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:42.935 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:42.935 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:42.935 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:43.662 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:43.685 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:43.707 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.912 seconds (JVM running for 43.793) 
10:25:43.709 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:43.767 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd67 closed 
10:25:43.767 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd67 
10:25:43.789 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:43.830 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:43.852 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:43.853 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@11d01072 
10:25:43.854 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:43.856 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:43.856 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:43.931 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56879, server: 101.37.175.111/101.37.175.111:2181 
10:25:43.991 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd68, negotiated timeout = 40000 
10:25:43.991 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:46.834 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:46.850 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:46.859 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.069 seconds (JVM running for 46.945) 
10:25:46.860 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:46.927 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd68 closed 
10:25:46.927 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd68 
10:25:46.945 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:46.988 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:46.999 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:47.000 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@3937709d 
10:25:47.000 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:47.000 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:47.000 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:47.055 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56901, server: 101.37.175.111/101.37.175.111:2181 
10:25:47.125 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd69, negotiated timeout = 40000 
10:25:47.125 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:47.937 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:47.937 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:47.938 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:47.938 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:50.074 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:50.086 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:50.093 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.148 seconds (JVM running for 50.179) 
10:25:50.094 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:50.147 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd69 closed 
10:25:50.147 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd69 
10:25:50.169 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:50.242 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:50.278 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:50.279 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@23571c9f 
10:25:50.279 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:50.279 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:50.280 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:50.342 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56926, server: 101.37.175.111/101.37.175.111:2181 
10:25:50.411 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6a, negotiated timeout = 40000 
10:25:50.412 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:52.941 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:52.941 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:52.941 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:52.941 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:53.662 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:53.673 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:53.679 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.509 seconds (JVM running for 53.765) 
10:25:53.679 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:53.744 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd6a closed 
10:25:53.744 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd6a 
10:25:53.756 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:53.785 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:53.795 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:53.795 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@55fb8cea 
10:25:53.795 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:53.795 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:53.795 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:53.857 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56950, server: 101.37.175.111/101.37.175.111:2181 
10:25:53.929 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6b, negotiated timeout = 40000 
10:25:53.929 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:56.530 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:56.574 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:56.603 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.846 seconds (JVM running for 56.689) 
10:25:56.604 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:56.699 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd6b closed 
10:25:56.699 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd6b 
10:25:56.769 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:56.865 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:56.916 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:56.917 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@73f33504 
10:25:56.917 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:56.918 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:56.919 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:57.005 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56974, server: 101.37.175.111/101.37.175.111:2181 
10:25:57.069 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6c, negotiated timeout = 40000 
10:25:57.069 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:25:57.942 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:25:57.944 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:57.944 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:57.944 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:25:59.724 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:25:59.734 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:25:59.740 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.969 seconds (JVM running for 59.826) 
10:25:59.740 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:25:59.807 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd6c closed 
10:25:59.807 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd6c 
10:25:59.821 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:25:59.858 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:25:59.890 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:25:59.890 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@64dd4157 
10:25:59.890 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:25:59.892 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:25:59.892 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:25:59.946 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:56994, server: 101.37.175.111/101.37.175.111:2181 
10:26:00.019 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6d, negotiated timeout = 40000 
10:26:00.019 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:26:02.693 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:26:02.703 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:26:02.708 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 2.886 seconds (JVM running for 62.794) 
10:26:02.708 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:26:02.770 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd6d closed 
10:26:02.770 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd6d 
10:26:02.782 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:26:02.813 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$d990cb8a] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:26:02.823 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:26:02.823 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@24401a1a 
10:26:02.823 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:26:02.824 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:26:02.824 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:26:02.878 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:57018, server: 101.37.175.111/101.37.175.111:2181 
10:26:02.945 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:26:02.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:26:02.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:26:02.945 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:26:02.949 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6e, negotiated timeout = 40000 
10:26:02.949 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:26:04.800 [Thread-35] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:26:04.800 [Thread-35] INFO  com.alibaba.nacos.client.naming - [BEAT] removing beat: DEFAULT_GROUP@@mooctest-crowdsource-backend:192.168.43.121:8090 from beat map. 
10:26:04.800 [Thread-35] INFO  com.alibaba.nacos.client.naming - [DEREGISTER-SERVICE] public deregistering service DEFAULT_GROUP@@mooctest-crowdsource-backend with instance: {"clusterName":"DEFAULT","enabled":true,"ephemeral":true,"healthy":true,"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ip":"192.168.43.121","ipDeleteTimeout":30000,"metadata":{},"port":8090,"weight":1.0} 
10:26:04.801 [Thread-35] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance?namespaceId=public&port=8090&clusterName=DEFAULT&ip=192.168.43.121&ephemeral=true&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8 from 127.0.0.1 
10:26:04.801 [Thread-35] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:89)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:26:04.801 [Thread-35] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:26:04.801 [Thread-35] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:26:04.802 [Thread-35] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:26:04.802 [Thread-35] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:26:04.806 [Thread-35] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:119}] to localhost:27017 because the pool has been closed. 
10:26:14.432 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$18f54677] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:26:14.956 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=175MB 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:26:14.957 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=357MB 
10:26:14.976 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:26:14.981 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@6124287a 
10:26:14.992 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:26:15.110 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:26:15.118 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:26:15.321 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:57116, server: 101.37.175.111/101.37.175.111:2181 
10:26:15.389 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd6f, negotiated timeout = 40000 
10:26:15.394 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:26:18.787 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:26:18.805 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:26:19.173 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:26:19.189 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 14ms. Found 0 repository interfaces. 
10:26:19.298 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:26:19.415 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$18f54677] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:26:19.611 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:26:19.626 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:26:19.626 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:26:19.694 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:26:19.695 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 883 ms 
10:26:19.927 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:26:19.983 [cluster-ClusterId{value='608b6acb6adc049f9bef4c46', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:120}] to localhost:27017 
10:26:19.987 [cluster-ClusterId{value='608b6acb6adc049f9bef4c46', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1732347} 
10:26:30.423 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$5a6af0d9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:26:30.535 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=169MB 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:26:30.536 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=343MB 
10:26:30.547 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:26:30.550 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@782168b7 
10:26:30.557 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:26:30.602 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:26:30.607 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:26:30.694 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:57226, server: 101.37.175.111/101.37.175.111:2181 
10:26:30.766 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd70, negotiated timeout = 40000 
10:26:30.771 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:26:33.900 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:26:33.919 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:26:34.254 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:26:34.273 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 17ms. Found 0 repository interfaces. 
10:26:34.378 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:26:34.470 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$5a6af0d9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:26:34.640 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:26:34.661 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:26:34.661 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:26:34.744 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:26:34.744 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 819 ms 
10:26:34.970 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:26:35.012 [cluster-ClusterId{value='608b6ada6adc049fa59bd540', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:121}] to localhost:27017 
10:26:35.017 [cluster-ClusterId{value='608b6ada6adc049fa59bd540', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2441612} 
10:26:35.332 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:122}] to localhost:27017 
10:26:35.606 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:26:35.606 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:26:35.610 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:26:35.610 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:26:35.857 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:26:36.186 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:26:36.674 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:26:37.010 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:26:37.013 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.941 seconds (JVM running for 12.093) 
10:26:53.933 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:26:53.935 [Thread-34] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:26:53.935 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:26:53.935 [Thread-34] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:26:53.940 [Thread-34] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:122}] to localhost:27017 because the pool has been closed. 
10:27:02.385 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1a7c6992] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=174MB 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:27:02.560 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=352MB 
10:27:02.575 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:27:02.578 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@1d12b024 
10:27:02.587 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:27:02.649 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:27:02.653 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:27:02.742 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:57452, server: 101.37.175.111/101.37.175.111:2181 
10:27:02.815 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd71, negotiated timeout = 40000 
10:27:02.820 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:27:05.869 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:27:05.894 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:27:06.203 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:27:06.217 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 12ms. Found 0 repository interfaces. 
10:27:06.314 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:27:06.405 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$1a7c6992] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:27:06.566 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:27:06.579 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:27:06.580 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:27:06.645 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:27:06.645 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 745 ms 
10:27:06.819 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:27:06.850 [cluster-ClusterId{value='608b6afa6adc049fc6b2aa0c', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:123}] to localhost:27017 
10:27:06.854 [cluster-ClusterId{value='608b6afa6adc049fc6b2aa0c', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1855114} 
10:27:07.066 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:124}] to localhost:27017 
10:27:07.277 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:27:07.277 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:27:07.280 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:27:07.280 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:27:07.407 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:27:07.546 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:27:07.787 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:27:07.935 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:27:07.938 [main] INFO  edu.nju.BugApplication - Started BugApplication in 5.984 seconds (JVM running for 10.018) 
10:27:21.894 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
10:27:21.894 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
10:27:21.902 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 7 ms 
10:33:35.484 [Thread-29] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:33:35.487 [Thread-29] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:33:35.487 [Thread-29] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:33:35.487 [Thread-29] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:33:35.496 [Thread-29] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:124}] to localhost:27017 because the pool has been closed. 
10:33:49.949 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$8f7bb68d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:33:50.049 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:33:50.049 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=162MB 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:33:50.050 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=339MB 
10:33:50.060 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:33:50.063 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@16a9a4f1 
10:33:50.070 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:33:50.118 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:33:50.123 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:33:50.215 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:60220, server: 101.37.175.111/101.37.175.111:2181 
10:33:50.284 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd73, negotiated timeout = 40000 
10:33:50.293 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:33:53.189 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:33:53.209 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:33:53.597 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:33:53.613 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 14ms. Found 0 repository interfaces. 
10:33:53.713 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:33:53.812 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$8f7bb68d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:33:53.973 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:33:53.987 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:33:53.987 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:33:54.071 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:33:54.071 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 855 ms 
10:33:54.261 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:33:54.293 [cluster-ClusterId{value='608b6c926adc04a05708ab96', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:125}] to localhost:27017 
10:33:54.296 [cluster-ClusterId{value='608b6c926adc04a05708ab96', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1637296} 
10:33:54.474 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:126}] to localhost:27017 
10:33:54.660 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:33:54.660 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:33:54.663 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:33:54.663 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:33:54.816 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:33:55.026 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:33:55.230 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:33:55.391 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:33:55.393 [main] INFO  edu.nju.BugApplication - Started BugApplication in 5.867 seconds (JVM running for 12.708) 
10:36:40.735 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:36:40.737 [Thread-34] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:36:40.737 [Thread-34] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:36:40.737 [Thread-34] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:36:40.742 [Thread-34] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:126}] to localhost:27017 because the pool has been closed. 
10:36:50.667 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$54a502f2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:36:50.787 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=408MB 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:36:50.788 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=596MB 
10:36:50.800 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:36:50.803 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7551da2a 
10:36:50.810 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:36:50.871 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:36:50.877 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:36:51.050 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61454, server: 101.37.175.111/101.37.175.111:2181 
10:36:51.190 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd75, negotiated timeout = 40000 
10:36:51.196 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:36:54.169 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:36:54.190 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:36:54.582 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:36:54.598 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 14ms. Found 0 repository interfaces. 
10:36:54.712 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:36:54.822 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$54a502f2] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:36:55.008 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:36:55.025 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:36:55.025 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:36:55.115 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:36:55.115 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 919 ms 
10:36:55.355 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:36:55.390 [cluster-ClusterId{value='608b6d476adc04a0c193f41d', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:127}] to localhost:27017 
10:36:55.393 [cluster-ClusterId{value='608b6d476adc04a0c193f41d', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1961814} 
10:36:55.610 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:128}] to localhost:27017 
10:36:55.857 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:36:55.857 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:36:55.860 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:36:55.860 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:36:56.015 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:36:56.166 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:36:56.395 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:36:56.522 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:36:56.524 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.247 seconds (JVM running for 11.868) 
10:37:16.175 [Thread-33] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:37:16.178 [Thread-33] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:37:16.178 [Thread-33] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:37:16.178 [Thread-33] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:37:16.184 [Thread-33] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:128}] to localhost:27017 because the pool has been closed. 
10:37:29.533 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$7adf33c1] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:37:30.062 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=168MB 
10:37:30.063 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:37:30.063 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=347MB 
10:37:30.087 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:37:30.090 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7435a578 
10:37:30.099 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:37:30.199 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:37:30.204 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:37:30.299 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61737, server: 101.37.175.111/101.37.175.111:2181 
10:37:30.385 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd76, negotiated timeout = 40000 
10:37:30.391 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:37:40.775 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$3ba05b8e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=443MB 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:37:40.930 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=630MB 
10:37:40.944 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:37:40.948 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@29f0c4f2 
10:37:40.956 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:37:41.018 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:37:41.023 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:37:41.117 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61811, server: 101.37.175.111/101.37.175.111:2181 
10:37:41.191 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd77, negotiated timeout = 40000 
10:37:41.196 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:37:43.856 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:37:43.895 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:37:44.426 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:37:44.446 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 18ms. Found 0 repository interfaces. 
10:37:44.584 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:37:44.701 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$3ba05b8e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:37:44.888 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:37:44.912 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:37:44.913 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:37:45.030 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:37:45.030 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1116 ms 
10:37:45.236 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:37:45.293 [cluster-ClusterId{value='608b6d796adc04a0e8f6c4da', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:129}] to localhost:27017 
10:37:45.298 [cluster-ClusterId{value='608b6d796adc04a0e8f6c4da', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2954990} 
10:37:45.852 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:130}] to localhost:27017 
10:37:46.250 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:37:46.250 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:37:46.253 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:37:46.253 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:37:46.448 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:37:56.404 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$b5971f11] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=176MB 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:37:56.529 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=347MB 
10:37:56.541 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:37:56.543 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@736f3e9e 
10:37:56.551 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:37:56.603 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:37:56.609 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:37:56.693 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:61922, server: 101.37.175.111/101.37.175.111:2181 
10:37:56.759 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd78, negotiated timeout = 40000 
10:37:56.764 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:37:59.708 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:37:59.726 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:38:00.049 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:38:00.066 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 15ms. Found 0 repository interfaces. 
10:38:00.168 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:38:00.269 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$b5971f11] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:38:00.455 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:38:00.470 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:38:00.470 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:38:00.550 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:38:00.550 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 817 ms 
10:38:00.734 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:38:00.769 [cluster-ClusterId{value='608b6d886adc04a0ecae7b12', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:131}] to localhost:27017 
10:38:00.772 [cluster-ClusterId{value='608b6d886adc04a0ecae7b12', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1757855} 
10:38:00.968 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:132}] to localhost:27017 
10:38:01.179 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:38:01.179 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:38:01.182 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:38:01.182 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:38:01.315 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:38:01.441 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:38:01.635 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:38:01.768 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:38:01.770 [main] INFO  edu.nju.BugApplication - Started BugApplication in 5.807 seconds (JVM running for 10.716) 
10:38:36.839 [Thread-32] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:38:36.841 [Thread-32] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:38:36.841 [Thread-32] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:38:36.841 [Thread-32] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:38:36.845 [Thread-32] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:132}] to localhost:27017 because the pool has been closed. 
10:38:44.583 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=412MB 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:38:44.684 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=601MB 
10:38:44.694 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:38:44.697 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@4d74c3ba 
10:38:44.703 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:38:44.707 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:38:44.719 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:38:44.816 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62258, server: 101.37.175.111/101.37.175.111:2181 
10:38:44.885 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd79, negotiated timeout = 40000 
10:38:44.890 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:38:47.739 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:38:47.760 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:38:48.142 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:38:48.159 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 15ms. Found 0 repository interfaces. 
10:38:48.263 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:38:48.384 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:38:48.569 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:38:48.586 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:38:48.586 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:38:48.691 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:38:48.691 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 924 ms 
10:38:48.927 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:38:48.964 [cluster-ClusterId{value='608b6db86adc04a117babb61', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:133}] to localhost:27017 
10:38:48.968 [cluster-ClusterId{value='608b6db86adc04a117babb61', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2276868} 
10:38:49.239 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:134}] to localhost:27017 
10:38:49.531 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:38:49.531 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:38:49.534 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:38:49.534 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:38:49.695 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:38:49.890 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:38:50.147 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:38:50.209 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:38:50.211 [main] INFO  edu.nju.BugApplication - Started BugApplication in 5.98 seconds (JVM running for 9.69) 
10:38:50.264 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:38:50.278 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:38:50.279 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@72925fc4 
10:38:50.279 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:38:50.279 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:38:50.279 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:38:50.338 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62296, server: 101.37.175.111/101.37.175.111:2181 
10:38:50.406 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7a, negotiated timeout = 40000 
10:38:50.406 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:38:53.447 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:38:53.480 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:38:53.546 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.319 seconds (JVM running for 13.025) 
10:38:53.565 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:38:53.707 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7a closed 
10:38:53.707 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7a 
10:38:53.726 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:38:53.761 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:38:53.776 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:38:53.776 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@2b715b4b 
10:38:53.776 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:38:53.776 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:38:53.777 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:38:54.045 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62324, server: 101.37.175.111/101.37.175.111:2181 
10:38:54.229 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7b, negotiated timeout = 40000 
10:38:54.229 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:38:55.275 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:38:55.275 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:38:55.276 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:38:55.276 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:38:55.299 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
10:38:55.299 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
10:38:55.305 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 6 ms 
10:39:00.279 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:00.280 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:00.280 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:00.280 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:05.286 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:05.286 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:05.286 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:05.286 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:10.289 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:10.290 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:10.290 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:10.290 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:15.296 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:15.296 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:15.297 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:15.297 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:20.300 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:20.300 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:20.300 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:20.300 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:25.305 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:25.306 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:25.306 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:25.306 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:30.307 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:30.307 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:30.307 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:30.307 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:35.312 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:35.313 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:35.313 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:35.313 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:40.314 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:40.314 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:40.314 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:40.314 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:45.317 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:45.318 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:45.318 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:45.318 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:50.323 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:50.323 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:50.347 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:50.347 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:55.352 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:39:55.352 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:55.352 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:39:55.353 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:00.355 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:00.374 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:00.375 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:00.375 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:03.093 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:40:03.106 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:40:03.113 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 69.386 seconds (JVM running for 82.591) 
10:40:03.114 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:40:05.170 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7b closed 
10:40:05.171 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7b 
10:40:05.187 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:40:05.220 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:40:05.232 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:40:05.232 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@3b91c524 
10:40:05.232 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:40:05.233 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:40:05.233 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:40:05.378 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:05.378 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:05.378 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:05.378 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:07.320 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62830, server: 101.37.175.111/101.37.175.111:2181 
10:40:09.422 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7c, negotiated timeout = 40000 
10:40:09.422 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:40:10.380 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:10.380 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:10.380 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:10.380 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.252 [http-nio-8090-exec-7] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.382 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:15.382 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.383 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.383 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.398 [http-nio-8090-exec-8] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:15.758 [http-nio-8090-exec-9] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:17.670 [http-nio-8090-exec-10] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:17.731 [http-nio-8090-exec-1] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:18.354 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:40:18.376 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:40:18.383 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 13.195 seconds (JVM running for 97.861) 
10:40:18.383 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:40:18.464 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7c closed 
10:40:18.464 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7c 
10:40:18.479 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:40:18.513 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:40:18.525 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:40:18.525 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7d741f5b 
10:40:18.525 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:40:18.525 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:40:18.525 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:40:18.586 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62936, server: 101.37.175.111/101.37.175.111:2181 
10:40:18.658 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7d, negotiated timeout = 40000 
10:40:18.658 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:40:20.388 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:20.388 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:20.389 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:20.389 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:21.597 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:40:21.608 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:40:21.614 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 3.134 seconds (JVM running for 101.092) 
10:40:21.615 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:40:21.674 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7d closed 
10:40:21.674 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7d 
10:40:21.689 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:40:21.720 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:40:21.731 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:40:21.731 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@21957db 
10:40:21.731 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:40:21.731 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:40:21.731 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:40:21.898 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:62967, server: 101.37.175.111/101.37.175.111:2181 
10:40:22.081 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7e, negotiated timeout = 40000 
10:40:22.081 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:40:25.397 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:25.398 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:25.398 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:25.399 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:27.744 [http-nio-8090-exec-2] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:29.141 [http-nio-8090-exec-3] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:30.233 [http-nio-8090-exec-4] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:30.404 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:30.404 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:30.405 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:30.405 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:33.234 [http-nio-8090-exec-5] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:34.733 [http-nio-8090-exec-6] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:35.124 [http-nio-8090-exec-7] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByTitle(RecommendService.java:202)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:150)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:40:35.409 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:35.409 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:35.410 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:35.410 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:40.411 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:40.411 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:40.411 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:40.412 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:45.418 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:45.418 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:45.418 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:45.418 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:46.025 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:40:46.177 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:40:46.183 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 24.493 seconds (JVM running for 125.661) 
10:40:46.183 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:40:47.153 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7e closed 
10:40:47.153 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7e 
10:40:47.169 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:40:47.200 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:40:47.211 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:40:47.211 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@318495da 
10:40:47.211 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:40:47.212 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:40:47.212 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:40:49.145 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:63140, server: 101.37.175.111/101.37.175.111:2181 
10:40:49.863 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd7f, negotiated timeout = 40000 
10:40:49.864 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:40:50.422 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:50.422 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:50.423 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:50.423 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:55.428 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:40:55.428 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:55.429 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:40:55.429 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:00.431 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:00.433 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:00.433 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:00.434 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:05.438 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:05.439 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:05.439 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:05.439 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:10.443 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:10.443 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:10.444 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:10.444 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:13.756 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:41:13.769 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:41:13.776 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 26.607 seconds (JVM running for 153.254) 
10:41:13.776 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:41:14.129 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd7f closed 
10:41:14.129 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd7f 
10:41:14.145 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:41:14.180 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:41:14.190 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:41:14.190 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@6c60fa47 
10:41:14.190 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:41:14.190 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:41:14.190 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:41:15.446 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:15.446 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:15.446 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:15.446 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:15.605 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:63320, server: 101.37.175.111/101.37.175.111:2181 
10:41:17.534 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd80, negotiated timeout = 40000 
10:41:17.534 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:41:20.451 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:20.452 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:20.452 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:20.452 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:25.456 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:25.456 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:25.456 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:25.456 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:30.460 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:30.461 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:30.461 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:30.461 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:35.462 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:35.463 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:35.463 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:35.463 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:37.388 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:41:37.398 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:41:37.406 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 23.26 seconds (JVM running for 176.884) 
10:41:37.407 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:41:37.612 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd80 closed 
10:41:37.612 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd80 
10:41:37.627 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:41:37.662 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:41:37.673 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:41:37.673 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@31823927 
10:41:37.673 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:41:37.674 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:41:37.674 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:41:38.232 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:63481, server: 101.37.175.111/101.37.175.111:2181 
10:41:39.700 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd81, negotiated timeout = 40000 
10:41:39.700 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:41:40.465 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:40.465 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:40.466 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:40.466 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:45.471 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:45.472 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:45.472 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:45.472 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:50.477 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:50.477 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:50.479 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:50.479 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:55.483 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:41:55.484 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:55.484 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:41:55.484 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:00.485 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:00.485 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:00.485 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:00.486 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:05.491 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:05.491 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:05.492 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:05.492 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:09.925 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:42:09.936 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:42:09.942 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 32.314 seconds (JVM running for 209.42) 
10:42:09.943 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:42:10.494 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:10.494 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:10.494 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:10.494 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:11.954 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd81 closed 
10:42:11.954 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd81 
10:42:11.969 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:42:12.003 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:42:12.014 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:42:12.014 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@59053694 
10:42:12.014 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:42:12.015 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:42:12.015 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:42:12.454 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:63719, server: 101.37.175.111/101.37.175.111:2181 
10:42:12.509 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd82, negotiated timeout = 40000 
10:42:12.509 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:42:15.500 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:15.500 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:15.500 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:15.500 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:20.506 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:20.506 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:20.506 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:20.507 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:25.508 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:25.508 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:25.508 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:25.508 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:30.514 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:30.514 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:30.515 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:30.515 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:35.520 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:35.521 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:35.521 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:35.521 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:40.524 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:40.525 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:40.525 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:40.525 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:43.038 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:42:43.068 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:42:43.076 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 31.106 seconds (JVM running for 242.554) 
10:42:43.095 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:42:43.295 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd82 closed 
10:42:43.295 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd82 
10:42:43.306 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:42:43.338 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:42:43.348 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:42:43.348 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7aef94e4 
10:42:43.348 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:42:43.349 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:42:43.349 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:42:43.788 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:63931, server: 101.37.175.111/101.37.175.111:2181 
10:42:45.529 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:45.529 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:45.529 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:45.530 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:45.760 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd83, negotiated timeout = 40000 
10:42:45.760 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:42:50.534 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:50.534 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:50.535 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:50.535 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:55.539 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:42:55.540 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:55.540 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:42:55.540 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:00.545 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:00.545 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:00.545 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:00.545 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:05.550 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:05.551 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:05.551 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:05.551 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:09.923 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:43:09.935 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:43:09.941 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 26.634 seconds (JVM running for 269.419) 
10:43:09.942 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:43:10.556 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:10.556 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:10.556 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:10.556 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:11.629 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd83 closed 
10:43:11.629 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd83 
10:43:11.643 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:43:11.674 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:43:11.685 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:43:11.685 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@40cb285d 
10:43:11.685 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:43:11.686 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:43:11.686 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:43:12.505 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:64119, server: 101.37.175.111/101.37.175.111:2181 
10:43:14.489 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd85, negotiated timeout = 40000 
10:43:14.489 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:43:15.558 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:15.558 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:15.558 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:15.559 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:17.735 [http-nio-8090-exec-8] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.GeneratedMethodAccessor133.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:43:19.566 [http-nio-8090-exec-9] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [/Bug/api] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause 
java.lang.NullPointerException: null
	at edu.nju.service.RecommendService.count(RecommendService.java:350)
	at edu.nju.service.RecommendService.recommandByDes(RecommendService.java:214)
	at edu.nju.controller.RecommendController.recommend(RecommendController.java:151)
	at sun.reflect.GeneratedMethodAccessor133.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at edu.nju.configuration.AddResponseHeaderFilter.doFilterInternal(AddResponseHeaderFilter.java:24)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
10:43:20.561 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:20.561 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:20.561 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:20.561 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:25.565 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:25.566 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:25.566 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:25.566 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:30.570 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:30.570 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:30.571 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:30.571 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:35.574 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:35.575 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:35.575 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:35.575 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:40.577 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:40.577 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:40.577 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:40.577 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:42.668 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:43:42.679 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:43:42.686 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 31.042 seconds (JVM running for 302.163) 
10:43:42.686 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:43:44.566 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd85 closed 
10:43:44.566 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd85 
10:43:44.580 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:43:44.611 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:43:44.621 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:43:44.621 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@7528fcc0 
10:43:44.621 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:43:44.622 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:43:44.622 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:43:44.685 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:64324, server: 101.37.175.111/101.37.175.111:2181 
10:43:44.758 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd86, negotiated timeout = 40000 
10:43:44.759 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:43:45.581 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:45.582 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:45.582 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:45.582 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:50.587 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:50.588 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:50.588 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:50.588 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:55.596 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:43:55.597 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:55.598 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:43:55.599 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:00.602 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:00.603 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:00.603 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:00.603 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:05.608 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:05.608 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:05.608 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:05.609 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:10.568 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:44:10.579 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:44:10.586 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 26.006 seconds (JVM running for 330.064) 
10:44:10.586 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:44:10.613 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:10.613 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:10.613 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:10.613 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:10.653 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd86 closed 
10:44:10.653 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd86 
10:44:10.667 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:44:10.699 [Curator-TreeCache-0] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$cd8138a8] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:44:10.710 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:44:10.710 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@1cfca1cc 
10:44:10.711 [Curator-TreeCache-0] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:44:10.711 [Curator-TreeCache-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:44:10.711 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:44:10.862 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:64499, server: 101.37.175.111/101.37.175.111:2181 
10:44:11.187 [Curator-TreeCache-0-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd87, negotiated timeout = 40000 
10:44:11.188 [Curator-TreeCache-0-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:44:15.618 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:15.618 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:15.618 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:15.618 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:20.622 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:20.623 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:20.623 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:20.623 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:25.627 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:25.627 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:25.627 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:25.627 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:30.632 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:30.632 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:30.632 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:30.632 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:35.634 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:35.634 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:35.634 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:35.634 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:40.639 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:40.640 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:40.640 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:40.641 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:43.873 [Curator-TreeCache-0] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:44:43.900 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - The following profiles are active: dev 
10:44:43.922 [Curator-TreeCache-0] INFO  o.s.boot.SpringApplication - Started application in 33.254 seconds (JVM running for 363.4) 
10:44:43.923 [Curator-Framework-0] INFO  o.a.c.f.imps.CuratorFrameworkImpl - backgroundOperationsLoop exiting 
10:44:44.429 [Curator-TreeCache-0-EventThread] INFO  org.apache.zookeeper.ClientCnxn - EventThread shut down for session: 0x17559ef9a3fcd87 
10:44:44.429 [Curator-TreeCache-0] INFO  org.apache.zookeeper.ZooKeeper - Session: 0x17559ef9a3fcd87 closed 
10:44:44.457 [Curator-TreeCache-0] INFO  o.s.c.e.event.RefreshEventListener - Refresh keys changed: [] 
10:44:45.647 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:45.647 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:45.648 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:45.648 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:50.652 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:50.652 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:50.652 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:50.652 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:55.657 [com.alibaba.nacos.naming.beat.sender] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance/beat?beat=%7B%22cluster%22%3A%22DEFAULT%22%2C%22ip%22%3A%22192.168.43.121%22%2C%22metadata%22%3A%7B%22preserved.register.source%22%3A%22SPRING_CLOUD%22%7D%2C%22period%22%3A5000%2C%22port%22%3A8090%2C%22scheduled%22%3Afalse%2C%22serviceName%22%3A%22DEFAULT_GROUP%40%40mooctest-crowdsource-backend%22%2C%22stopped%22%3Afalse%2C%22weight%22%3A1.0%7D&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8&namespaceId=public from 127.0.0.1 
10:44:55.657 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1334)
	at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1309)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:85)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:55.657 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:44:55.658 [com.alibaba.nacos.naming.beat.sender] ERROR com.alibaba.nacos.client.naming - [CLIENT-BEAT] failed to send beat: {"cluster":"DEFAULT","ip":"192.168.43.121","metadata":{"preserved.register.source":"SPRING_CLOUD"},"period":5000,"port":8090,"scheduled":false,"serviceName":"DEFAULT_GROUP@@mooctest-crowdsource-backend","stopped":false,"weight":1.0} 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance/beat after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance/beat. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.sendBeat(NamingProxy.java:309)
	at com.alibaba.nacos.client.naming.beat.BeatReactor$BeatTask.run(BeatReactor.java:92)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
10:45:00.550 [Thread-29] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:45:00.550 [Thread-29] INFO  com.alibaba.nacos.client.naming - [BEAT] removing beat: DEFAULT_GROUP@@mooctest-crowdsource-backend:192.168.43.121:8090 from beat map. 
10:45:00.550 [Thread-29] INFO  com.alibaba.nacos.client.naming - [DEREGISTER-SERVICE] public deregistering service DEFAULT_GROUP@@mooctest-crowdsource-backend with instance: {"clusterName":"DEFAULT","enabled":true,"ephemeral":true,"healthy":true,"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ip":"192.168.43.121","ipDeleteTimeout":30000,"metadata":{},"port":8090,"weight":1.0} 
10:45:00.551 [Thread-29] WARN  com.alibaba.nacos.client.naming - failed to request http://127.0.0.1:8848/nacos/v1/ns/instance?namespaceId=public&port=8090&clusterName=DEFAULT&ip=192.168.43.121&ephemeral=true&serviceName=DEFAULT_GROUP%40%40mooctest-crowdsource-backend&encoding=UTF-8 from 127.0.0.1 
10:45:00.551 [Thread-29] ERROR com.alibaba.nacos.client.naming - [NA] failed to request  
java.net.ConnectException: Connection refused (Connection refused)
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1220)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:984)
	at com.alibaba.nacos.client.naming.net.HttpClient.request(HttpClient.java:89)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:410)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:45:00.551 [Thread-29] ERROR com.alibaba.nacos.client.naming - request 127.0.0.1:8848 failed. 
com.alibaba.nacos.api.exception.NacosException: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:45:00.551 [Thread-29] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:45:00.551 [Thread-29] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:45:00.552 [Thread-29] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:45:00.557 [Thread-29] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:134}] to localhost:27017 because the pool has been closed. 
10:45:09.121 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$a7d53975] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=325MB 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:45:09.285 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=508MB 
10:45:09.305 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:45:09.308 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@398474a2 
10:45:09.317 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:45:09.325 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:45:09.411 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:45:10.420 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:64899, server: 101.37.175.111/101.37.175.111:2181 
10:45:10.485 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd88, negotiated timeout = 40000 
10:45:10.490 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:45:39.244 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:45:39.263 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:45:39.679 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:45:39.698 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 17ms. Found 0 repository interfaces. 
10:45:39.816 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:45:39.948 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$a7d53975] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:45:40.164 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:45:40.186 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:45:40.186 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:45:40.291 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:45:40.291 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1021 ms 
10:45:40.512 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:45:40.551 [cluster-ClusterId{value='608b6f546adc04a1fa828e19', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:135}] to localhost:27017 
10:45:40.555 [cluster-ClusterId{value='608b6f546adc04a1fa828e19', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2444859} 
10:45:40.892 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:136}] to localhost:27017 
10:45:41.103 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:45:41.103 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:45:41.106 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:45:41.106 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:45:41.232 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:45:41.371 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:45:41.586 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:45:41.812 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:45:41.814 [main] INFO  edu.nju.BugApplication - Started BugApplication in 33.146 seconds (JVM running for 37.176) 
10:47:05.220 [Thread-84] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:47:05.222 [Thread-84] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:47:05.222 [Thread-84] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:47:05.222 [Thread-84] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:47:05.229 [Thread-84] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:136}] to localhost:27017 because the pool has been closed. 
10:47:14.727 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$71172201] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:47:14.859 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=174MB 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:47:14.860 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=346MB 
10:47:14.878 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:47:14.882 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@4e628b52 
10:47:14.895 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:47:14.953 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:47:14.958 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:47:15.049 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:49372, server: 101.37.175.111/101.37.175.111:2181 
10:47:15.117 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd89, negotiated timeout = 40000 
10:47:15.122 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:47:18.031 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:47:18.055 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:47:18.547 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:47:18.566 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 17ms. Found 0 repository interfaces. 
10:47:18.699 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:47:18.825 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$71172201] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:47:19.012 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:47:19.030 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:47:19.030 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:47:19.127 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:47:19.127 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1064 ms 
10:47:19.336 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:47:19.369 [cluster-ClusterId{value='608b6fb76adc04a242770fb4', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:137}] to localhost:27017 
10:47:19.373 [cluster-ClusterId{value='608b6fb76adc04a242770fb4', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2053682} 
10:47:19.589 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:138}] to localhost:27017 
10:47:19.812 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:47:19.812 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:47:19.815 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:47:19.815 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:47:19.949 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:47:20.082 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:47:20.300 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:47:20.437 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:47:20.439 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.119 seconds (JVM running for 10.444) 
10:50:57.236 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
10:50:57.236 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
10:50:57.243 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 7 ms 
10:50:57.347 [http-nio-8090-exec-1] WARN  org.ansj.util.MyStaticValue - not find library.properties in classpath use it by default ! 
10:50:57.350 [http-nio-8090-exec-1] INFO  org.ansj.dic.impl.File2Stream - path to stream library/ambiguity.dic 
10:50:57.350 [http-nio-8090-exec-1] ERROR org.ansj.library.AmbiguityLibrary - Init ambiguity library error :org.ansj.exception.LibraryException:  path :library/ambiguity.dic file:/Users/guochao/Desktop/project/crowdsource-backend/library/ambiguity.dic not found or can not to read, path: library/ambiguity.dic 
10:50:57.351 [http-nio-8090-exec-1] INFO  org.ansj.dic.impl.File2Stream - path to stream library/default.dic 
10:50:57.351 [http-nio-8090-exec-1] ERROR org.ansj.library.DicLibrary - Init ambiguity library error :org.ansj.exception.LibraryException:  path :library/default.dic file:/Users/guochao/Desktop/project/crowdsource-backend/library/default.dic not found or can not to read, path: library/default.dic 
10:50:57.594 [http-nio-8090-exec-1] INFO  org.ansj.library.DATDictionary - init core library ok use time : 233 
10:50:57.904 [http-nio-8090-exec-1] INFO  org.ansj.library.NgramLibrary - init ngram ok use time :305 
10:50:58.236 [http-nio-8090-exec-2] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:3, serverValue:139}] to localhost:27017 
10:54:49.910 [Thread-31] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
10:54:49.914 [Thread-31] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
10:54:49.914 [Thread-31] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
10:54:49.915 [Thread-31] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
10:54:49.921 [Thread-31] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:138}] to localhost:27017 because the pool has been closed. 
10:54:49.922 [Thread-31] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:3, serverValue:139}] to localhost:27017 because the pool has been closed. 
10:54:59.365 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$f69e8751] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=413MB 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
10:54:59.480 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=601MB 
10:54:59.492 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
10:54:59.495 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@61f3fbb8 
10:54:59.503 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
10:54:59.509 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
10:54:59.563 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
10:54:59.652 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:52537, server: 101.37.175.111/101.37.175.111:2181 
10:54:59.716 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd8c, negotiated timeout = 40000 
10:54:59.721 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
10:55:02.376 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
10:55:02.396 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
10:55:02.844 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
10:55:02.863 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 17ms. Found 0 repository interfaces. 
10:55:02.998 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
10:55:03.125 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$f69e8751] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
10:55:03.337 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
10:55:03.356 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
10:55:03.356 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
10:55:03.448 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
10:55:03.448 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1045 ms 
10:55:03.690 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
10:55:03.727 [cluster-ClusterId{value='608b71876adc04a333c24bf5', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:140}] to localhost:27017 
10:55:03.730 [cluster-ClusterId{value='608b71876adc04a333c24bf5', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=1831780} 
10:55:04.046 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:141}] to localhost:27017 
10:55:04.374 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:55:04.374 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:55:04.382 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
10:55:04.382 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
10:55:04.582 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
10:55:05.048 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
10:55:05.558 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
10:55:05.848 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
10:55:05.850 [main] INFO  edu.nju.BugApplication - Started BugApplication in 6.916 seconds (JVM running for 11.355) 
11:00:26.754 [Thread-33] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
11:00:26.757 [Thread-33] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
11:00:26.757 [Thread-33] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
11:00:26.757 [Thread-33] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
11:00:26.764 [Thread-33] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:141}] to localhost:27017 because the pool has been closed. 
11:00:38.775 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$575e98b9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
11:00:38.989 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
11:00:38.990 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=164MB 
11:00:38.990 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
11:00:38.990 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=336MB 
11:00:39.011 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
11:00:39.016 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@15fa55a6 
11:00:39.030 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
11:00:39.121 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
11:00:39.131 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
11:00:39.231 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:54846, server: 101.37.175.111/101.37.175.111:2181 
11:00:39.313 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd8d, negotiated timeout = 40000 
11:00:39.320 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
11:00:42.433 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
11:00:42.462 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
11:00:43.271 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
11:00:43.301 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 27ms. Found 0 repository interfaces. 
11:00:43.508 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
11:00:43.699 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$575e98b9] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
11:00:44.036 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
11:00:44.065 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
11:00:44.066 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
11:00:44.203 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
11:00:44.203 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1729 ms 
11:00:44.598 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
11:00:44.657 [cluster-ClusterId{value='608b72dc6adc04aa5703e1e4', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:142}] to localhost:27017 
11:00:44.663 [cluster-ClusterId{value='608b72dc6adc04aa5703e1e4', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=3061160} 
11:00:45.069 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:143}] to localhost:27017 
11:00:45.464 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
11:00:45.464 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
11:00:45.469 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
11:00:45.469 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
11:00:45.700 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
11:00:45.944 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
11:00:46.299 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
11:00:46.558 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
11:00:46.562 [main] INFO  edu.nju.BugApplication - Started BugApplication in 8.501 seconds (JVM running for 14.945) 
11:01:07.391 [Thread-40] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
11:01:07.394 [Thread-40] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
11:01:07.395 [Thread-40] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
11:01:07.395 [Thread-40] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
11:01:07.403 [Thread-40] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:143}] to localhost:27017 because the pool has been closed. 
11:01:22.134 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$36bca2f] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
11:01:22.342 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:zookeeper.version=3.5.3-beta-8ce24f9e675cbefffb8f21a47e06b42864475a60, built on 04/03/2017 16:19 GMT 
11:01:22.342 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:host.name=192.168.43.121 
11:01:22.342 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.version=1.8.0_181 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.vendor=Oracle Corporation 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.class.path=/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/lib/tools.jar:/Users/guochao/Desktop/project/crowdsource-backend/target/classes:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-web/2.1.4.RELEASE/spring-boot-starter-web-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter/2.1.4.RELEASE/spring-boot-starter-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot/2.1.4.RELEASE/spring-boot-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.1.4.RELEASE/spring-boot-autoconfigure-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-logging/2.1.4.RELEASE/spring-boot-starter-logging-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/guochao/.m2/repository/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-to-slf4j/2.11.2/log4j-to-slf4j-2.11.2.jar:/Users/guochao/.m2/repository/org/apache/logging/log4j/log4j-api/2.11.2/log4j-api-2.11.2.jar:/Users/guochao/.m2/repository/org/slf4j/jul-to-slf4j/1.7.26/jul-to-slf4j-1.7.26.jar:/Users/guochao/.m2/repository/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/guochao/.m2/repository/org/yaml/snakeyaml/1.23/snakeyaml-1.23.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-json/2.1.4.RELEASE/spring-boot-starter-json-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.9.8/jackson-databind-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.9.8/jackson-core-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.8/jackson-datatype-jdk8-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.8/jackson-datatype-jsr310-2.9.8.jar:/Users/guochao/.m2/repository/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.8/jackson-module-parameter-names-2.9.8.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-tomcat/2.1.4.RELEASE/spring-boot-starter-tomcat-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/9.0.17/tomcat-embed-core-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-el/9.0.17/tomcat-embed-el-9.0.17.jar:/Users/guochao/.m2/repository/org/apache/tomcat/embed/tomcat-embed-websocket/9.0.17/tomcat-embed-websocket-9.0.17.jar:/Users/guochao/.m2/repository/org/hibernate/validator/hibernate-validator/6.0.16.Final/hibernate-validator-6.0.16.Final.jar:/Users/guochao/.m2/repository/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/guochao/.m2/repository/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/guochao/.m2/repository/com/fasterxml/classmate/1.4.0/classmate-1.4.0.jar:/Users/guochao/.m2/repository/org/springframework/spring-web/5.1.6.RELEASE/spring-web-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-beans/5.1.6.RELEASE/spring-beans-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-webmvc/5.1.6.RELEASE/spring-webmvc-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-context/5.1.6.RELEASE/spring-context-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-expression/5.1.6.RELEASE/spring-expression-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/session/spring-session-core/2.1.5.RELEASE/spring-session-core-2.1.5.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-jcl/5.1.6.RELEASE/spring-jcl-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/slf4j/slf4j-api/1.7.26/slf4j-api-1.7.26.jar:/Users/guochao/.m2/repository/org/springframework/spring-core/5.1.6.RELEASE/spring-core-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/guochao/.m2/repository/org/json/json/20160810/json-20160810.jar:/Users/guochao/.m2/repository/org/apache/poi/poi/3.17/poi-3.17.jar:/Users/guochao/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml/3.17/poi-ooxml-3.17.jar:/Users/guochao/.m2/repository/org/apache/poi/poi-ooxml-schemas/3.17/poi-ooxml-schemas-3.17.jar:/Users/guochao/.m2/repository/org/apache/xmlbeans/xmlbeans/2.6.0/xmlbeans-2.6.0.jar:/Users/guochao/.m2/repository/com/github/virtuald/curvesapi/1.04/curvesapi-1.04.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-data-mongodb/2.1.4.RELEASE/spring-boot-starter-data-mongodb-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver/3.8.2/mongodb-driver-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/bson/3.8.2/bson-3.8.2.jar:/Users/guochao/.m2/repository/org/mongodb/mongodb-driver-core/3.8.2/mongodb-driver-core-3.8.2.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-mongodb/2.1.6.RELEASE/spring-data-mongodb-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-tx/5.1.6.RELEASE/spring-tx-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/data/spring-data-commons/2.1.6.RELEASE/spring-data-commons-2.1.6.RELEASE.jar:/Users/guochao/.m2/repository/commons-fileupload/commons-fileupload/1.2.1/commons-fileupload-1.2.1.jar:/Users/guochao/.m2/repository/org/ansj/ansj_seg/5.1.1/ansj_seg-5.1.1.jar:/Users/guochao/.m2/repository/org/nlpcn/nlp-lang/1.7.2/nlp-lang-1.7.2.jar:/Users/guochao/.m2/repository/com/hankcs/hanlp/portable-1.7.0/hanlp-portable-1.7.0.jar:/Users/guochao/.m2/repository/org/projectlombok/lombok/1.18.8/lombok-1.18.8.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper-config/2.1.2.RELEASE/spring-cloud-starter-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-zookeeper/2.1.2.RELEASE/spring-cloud-starter-zookeeper-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-commons/2.1.2.RELEASE/spring-cloud-commons-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-core/2.1.2.RELEASE/spring-cloud-zookeeper-core-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-zookeeper-config/2.1.2.RELEASE/spring-cloud-zookeeper-config-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-recipes/4.0.1/curator-recipes-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-framework/4.0.1/curator-framework-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/curator/curator-client/4.0.1/curator-client-4.0.1.jar:/Users/guochao/.m2/repository/org/apache/zookeeper/zookeeper/3.5.3-beta/zookeeper-3.5.3-beta.jar:/Users/guochao/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-context/2.1.2.RELEASE/spring-cloud-context-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-crypto/5.1.5.RELEASE/spring-security-crypto-5.1.5.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-starter-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-starter-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/cloud/spring-cloud-alibaba-nacos-discovery/2.1.0.RELEASE/spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-client/1.1.1/nacos-client-1.1.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-common/1.1.1/nacos-common-1.1.1.jar:/Users/guochao/.m2/repository/commons-io/commons-io/2.2/commons-io-2.2.jar:/Users/guochao/.m2/repository/org/apache/commons/commons-lang3/3.8.1/commons-lang3-3.8.1.jar:/Users/guochao/.m2/repository/com/alibaba/nacos/nacos-api/1.1.1/nacos-api-1.1.1.jar:/Users/guochao/.m2/repository/io/prometheus/simpleclient/0.5.0/simpleclient-0.5.0.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-ribbon/2.1.2.RELEASE/spring-cloud-starter-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter/2.1.2.RELEASE/spring-cloud-starter-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/security/spring-security-rsa/1.0.7.RELEASE/spring-security-rsa-1.0.7.RELEASE.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.60/bcpkix-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.60/bcprov-jdk15on-1.60.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-ribbon/2.1.2.RELEASE/spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-netflix-archaius/2.1.2.RELEASE/spring-cloud-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/cloud/spring-cloud-starter-netflix-archaius/2.1.2.RELEASE/spring-cloud-starter-netflix-archaius-2.1.2.RELEASE.jar:/Users/guochao/.m2/repository/com/netflix/archaius/archaius-core/0.7.6/archaius-core-0.7.6.jar:/Users/guochao/.m2/repository/commons-configuration/commons-configuration/1.8/commons-configuration-1.8.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon/2.3.0/ribbon-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-transport/2.3.0/ribbon-transport-2.3.0.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-contexts/0.4.9/rxnetty-contexts-0.4.9.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty-servo/0.4.9/rxnetty-servo-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/hystrix/hystrix-core/1.5.18/hystrix-core-1.5.18.jar:/Users/guochao/.m2/repository/org/hdrhistogram/HdrHistogram/2.1.9/HdrHistogram-2.1.9.jar:/Users/guochao/.m2/repository/javax/inject/javax.inject/1/javax.inject-1.jar:/Users/guochao/.m2/repository/io/reactivex/rxnetty/0.4.9/rxnetty-0.4.9.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-core/2.3.0/ribbon-core-2.3.0.jar:/Users/guochao/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-httpclient/2.3.0/ribbon-httpclient-2.3.0.jar:/Users/guochao/.m2/repository/commons-collections/commons-collections/3.2.2/commons-collections-3.2.2.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-client/1.19.1/jersey-client-1.19.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/jersey-core/1.19.1/jersey-core-1.19.1.jar:/Users/guochao/.m2/repository/javax/ws/rs/jsr311-api/1.1.1/jsr311-api-1.1.1.jar:/Users/guochao/.m2/repository/com/sun/jersey/contribs/jersey-apache-client4/1.19.1/jersey-apache-client4-1.19.1.jar:/Users/guochao/.m2/repository/com/netflix/servo/servo-core/0.12.21/servo-core-0.12.21.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-commons-util/0.3.0/netflix-commons-util-0.3.0.jar:/Users/guochao/.m2/repository/com/netflix/ribbon/ribbon-loadbalancer/2.3.0/ribbon-loadbalancer-2.3.0.jar:/Users/guochao/.m2/repository/com/netflix/netflix-commons/netflix-statistics/0.1.1/netflix-statistics-0.1.1.jar:/Users/guochao/.m2/repository/io/reactivex/rxjava/1.3.8/rxjava-1.3.8.jar:/Users/guochao/.m2/repository/com/aliyun/oss/aliyun-sdk-oss/3.8.0/aliyun-sdk-oss-3.8.0.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpclient/4.5.8/httpclient-4.5.8.jar:/Users/guochao/.m2/repository/org/apache/httpcomponents/httpcore/4.4.11/httpcore-4.4.11.jar:/Users/guochao/.m2/repository/org/jdom/jdom/1.1/jdom-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/jettison/jettison/1.1/jettison-1.1.jar:/Users/guochao/.m2/repository/stax/stax-api/1.0.1/stax-api-1.0.1.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-core/3.4.0/aliyun-java-sdk-core-3.4.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ram/3.0.0/aliyun-java-sdk-ram-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-sts/3.0.0/aliyun-java-sdk-sts-3.0.0.jar:/Users/guochao/.m2/repository/com/aliyun/aliyun-java-sdk-ecs/4.2.0/aliyun-java-sdk-ecs-4.2.0.jar:/Users/guochao/.m2/repository/org/springframework/boot/spring-boot-starter-aop/2.1.4.RELEASE/spring-boot-starter-aop-2.1.4.RELEASE.jar:/Users/guochao/.m2/repository/org/springframework/spring-aop/5.1.6.RELEASE/spring-aop-5.1.6.RELEASE.jar:/Users/guochao/.m2/repository/org/aspectj/aspectjweaver/1.9.2/aspectjweaver-1.9.2.jar:/Users/guochao/.m2/repository/com/google/guava/guava/25.0-jre/guava-25.0-jre.jar:/Users/guochao/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/guochao/.m2/repository/org/checkerframework/checker-compat-qual/2.0.0/checker-compat-qual-2.0.0.jar:/Users/guochao/.m2/repository/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar:/Users/guochao/.m2/repository/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar:/Users/guochao/.m2/repository/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar:/Users/guochao/.m2/repository/io/github/yedaxia/japidocs/1.4.4/japidocs-1.4.4.jar:/Users/guochao/.m2/repository/com/alibaba/fastjson/1.2.70/fastjson-1.2.70.jar:/Users/guochao/.m2/repository/com/github/javaparser/javaparser-core/3.6.16/javaparser-core-3.6.16.jar:/Users/guochao/.m2/repository/org/freemarker/freemarker/2.3.28/freemarker-2.3.28.jar:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.library.path=/Users/guochao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:. 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.io.tmpdir=/var/folders/z7/lr15ch9n11jbc7g7ktktl8nw0000gn/T/ 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:java.compiler=<NA> 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.name=Mac OS X 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.arch=x86_64 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.version=10.14.6 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.name=guochao 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.home=/Users/guochao 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:user.dir=/Users/guochao/Desktop/project/crowdsource-backend 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.free=159MB 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.max=3641MB 
11:01:22.343 [main] INFO  org.apache.zookeeper.ZooKeeper - Client environment:os.memory.total=334MB 
11:01:22.365 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Starting 
11:01:22.370 [main] INFO  org.apache.zookeeper.ZooKeeper - Initiating client connection, connectString=101.37.175.111:2181 sessionTimeout=60000 watcher=org.apache.curator.ConnectionState@31ee96f4 
11:01:22.384 [main] INFO  o.apache.zookeeper.ClientCnxnSocket - jute.maxbuffer value is 4194304 Bytes 
11:01:22.475 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Opening socket connection to server 101.37.175.111/101.37.175.111:2181. Will not attempt to authenticate using SASL (unknown error) 
11:01:22.485 [main] INFO  o.a.c.f.imps.CuratorFrameworkImpl - Default schema 
11:01:22.666 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Socket connection established, initiating session, client: /192.168.43.121:55140, server: 101.37.175.111/101.37.175.111:2181 
11:01:22.734 [main-SendThread(101.37.175.111:2181)] INFO  org.apache.zookeeper.ClientCnxn - Session establishment complete on server 101.37.175.111/101.37.175.111:2181, sessionid = 0x17559ef9a3fcd8e, negotiated timeout = 40000 
11:01:22.741 [main-EventThread] INFO  o.a.c.f.s.ConnectionStateManager - State change: CONNECTED 
11:01:25.659 [main] INFO  o.s.c.b.c.PropertySourceBootstrapConfiguration - Located property source: CompositePropertySource {name='zookeeper', propertySources=[ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend,dev'}, ZookeeperPropertySource {name='/config/mooctest-crowdsource-backend'}, ZookeeperPropertySource {name='/config/application,dev'}, ZookeeperPropertySource {name='/config/application'}]} 
11:01:25.689 [main] INFO  edu.nju.BugApplication - The following profiles are active: dev 
11:01:26.392 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Bootstrapping Spring Data repositories in DEFAULT mode. 
11:01:26.422 [main] INFO  o.s.d.r.c.RepositoryConfigurationDelegate - Finished Spring Data repository scanning in 27ms. Found 0 repository interfaces. 
11:01:26.641 [main] INFO  o.s.c.context.scope.GenericScope - BeanFactory id=b2306abe-4109-3c0b-bf9b-f4447f91967a 
11:01:26.848 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$36bca2f] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 
11:01:27.222 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8090 (http) 
11:01:27.252 [main] INFO  o.a.catalina.core.StandardService - Starting service [Tomcat] 
11:01:27.252 [main] INFO  o.a.catalina.core.StandardEngine - Starting Servlet engine: [Apache Tomcat/9.0.17] 
11:01:27.389 [main] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring embedded WebApplicationContext 
11:01:27.389 [main] INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 1689 ms 
11:01:27.765 [main] INFO  org.mongodb.driver.cluster - Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500} 
11:01:27.877 [cluster-ClusterId{value='608b73076adc04aa80a5828a', description='null'}-localhost:27017] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:1, serverValue:144}] to localhost:27017 
11:01:27.883 [cluster-ClusterId{value='608b73076adc04aa80a5828a', description='null'}-localhost:27017] INFO  org.mongodb.driver.cluster - Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 11]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=3709112} 
11:01:28.366 [main] INFO  org.mongodb.driver.connection - Opened connection [connectionId{localValue:2, serverValue:145}] to localhost:27017 
11:01:28.823 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
11:01:28.824 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
11:01:28.829 [main] WARN  c.n.c.s.URLConfigurationSource - No URLs will be polled as dynamic configuration sources. 
11:01:28.829 [main] INFO  c.n.c.s.URLConfigurationSource - To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath. 
11:01:29.088 [main] INFO  o.s.s.c.ThreadPoolTaskExecutor - Initializing ExecutorService 'applicationTaskExecutor' 
11:01:29.442 [main] INFO  o.s.s.c.ThreadPoolTaskScheduler - Initializing ExecutorService 
11:01:29.805 [main] INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): 8090 (http) with context path '/Bug/api' 
11:01:30.072 [main] ERROR c.a.c.n.r.NacosServiceRegistry - nacos registry, mooctest-crowdsource-backend register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:188)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:184)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:61)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239)
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:166)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
	at edu.nju.BugApplication.main(BugApplication.java:31)
11:01:30.076 [main] INFO  edu.nju.BugApplication - Started BugApplication in 8.641 seconds (JVM running for 16.27) 
11:02:10.325 [http-nio-8090-exec-1] INFO  o.a.c.c.C.[.[localhost].[/Bug/api] - Initializing Spring DispatcherServlet 'dispatcherServlet' 
11:02:10.325 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Initializing Servlet 'dispatcherServlet' 
11:02:10.332 [http-nio-8090-exec-1] INFO  o.s.web.servlet.DispatcherServlet - Completed initialization in 7 ms 
11:04:30.129 [Thread-42] INFO  c.a.c.n.r.NacosServiceRegistry - De-registering from Nacos Server now... 
11:04:30.131 [Thread-42] ERROR c.a.c.n.r.NacosServiceRegistry - ERR_NACOS_DEREGISTER, de-register failed...NacosRegistration{nacosDiscoveryProperties=NacosDiscoveryProperties{serverAddr='127.0.0.1:8848', endpoint='', namespace='', watchDelay=30000, logName='', service='mooctest-crowdsource-backend', weight=1.0, clusterName='DEFAULT', namingLoadCacheAtStart='false', metadata={preserved.register.source=SPRING_CLOUD}, registerEnabled=true, ip='192.168.43.121', networkInterface='', port=8090, secure=false, accessKey='', secretKey=''}}, 
java.lang.IllegalStateException: failed to req API:/nacos/v1/ns/instance after all servers([127.0.0.1:8848]) tried: failed to req API:127.0.0.1:8848/nacos/v1/ns/instance. code:500 msg: java.net.ConnectException: Connection refused (Connection refused)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:464)
	at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386)
	at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:205)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:244)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:231)
	at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:221)
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.deregister(NacosServiceRegistry.java:85)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.deregister(AbstractAutoServiceRegistration.java:256)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.stop(AbstractAutoServiceRegistration.java:271)
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.destroy(AbstractAutoServiceRegistration.java:208)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1055)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1062)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1057)
	at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1026)
	at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:945)
11:04:30.131 [Thread-42] INFO  c.a.c.n.r.NacosServiceRegistry - De-registration finished. 
11:04:30.132 [Thread-42] INFO  o.s.s.c.ThreadPoolTaskExecutor - Shutting down ExecutorService 'applicationTaskExecutor' 
11:04:30.137 [Thread-42] INFO  org.mongodb.driver.connection - Closed connection [connectionId{localValue:2, serverValue:145}] to localhost:27017 because the pool has been closed.