com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known serve

冷不防 2022-05-19 07:21 125阅读 0赞

## 问题描述： ##

使用`java -jar`启动`Eureka Server`集群程序时，控制台报出了以下错误：

Caused by: java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_161]
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_161]
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_161]
        at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_161]
        at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:117) ~[httpclient-4.5.1.jar!/:4.5.1]
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55) ~[httpclient-4.5.1.jar!/:4.5.1]
        at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar!/:1.19.1]
        ... 29 common frames omitted
    
    2018-07-22 16:29:18.267  WARN 7831 --- [nfoReplicator-0] c.n.d.s.t.d.RetryableEurekaHttpClient    : Request execution failed with message: java.net.ConnectException: Connection refused (Connection refused)
    2018-07-22 16:29:18.268  WARN 7831 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_EUREKA-SERVER-PEER/192.168.1.3:eureka-server-peer:8762 - registration failed Cannot execute request on any known server
    
    com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
        at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:807) ~[eureka-client-1.7.0.jar!/:1.7.0]
        at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104) [eureka-client-1.7.0.jar!/:1.7.0]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_161]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_161]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_161]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_161]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_161]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_161]
        at java.lang.Thread.run(Thread.java:748) [na:1.8.0_161]

## 问题原因 ##

导致此问题的原因是因为，`Eureka Server` 在启动时也将自身做为服务向注册中心注册了，所以需要禁用该属性

## 解决方案 ##

在`application.yml`配置文件中增加如下配置

eureka:
      client:
        register-with-eureka: false # 表示不向注册中心注册
        fetch-registry: false # 由于注册中心的职责就是维护服务实例，所以它不需要去检索服务