Go agents not connecting to the Go server

[James Wright]

I have recently been doing some cleanup of my Go Server jobs removing old pipelines, etc then I noticed that I was unable to get a response from the agents after loading the agents page. I checked the logs fro the agent and I am getting errors like the following. Any thoughts? Server and Agents are running on Windows and the windows firewall is turned off on the Go Server.

2020-03-25 11:06:05,420 ERROR [scheduler-3] AgentHTTPClientController:103 - Error occurred when agent tried to ping server: 

org.springframework.remoting.RemoteConnectFailureException: Could not connect to HTTP invoker remote service at [https://10.32.16.225:8154/go/remoting/remoteBuildRepository]; nested exception is org.apache.http.conn.HttpHostConnectException: Connect to 10.32.16.225:8154 [/10.32.16.225] failed: Connection refused: connect

at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.convertHttpInvokerAccessException(HttpInvokerClientInterceptor.java:215)

at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.invoke(HttpInvokerClientInterceptor.java:153)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)

at com.sun.proxy.$Proxy10.ping(Unknown Source)

at com.thoughtworks.go.agent.AgentHTTPClientController.ping(AgentHTTPClientController.java:98)

at jdk.internal.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:566)

at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)

at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)

at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)

at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)

at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)

at java.base/java.lang.Thread.run(Thread.java:834)

Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 10.32.16.225:8154 [/10.32.16.225] failed: Connection refused: connect

at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:159)

at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:373)

at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:394)

at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)

at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)

at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)

at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)

at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)

at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)

at com.thoughtworks.go.agent.common.ssl.GoAgentServerHttpClient.execute(GoAgentServerHttpClient.java:54)

at com.thoughtworks.go.agent.GoHttpClientHttpInvokerRequestExecutor.doExecuteRequest(GoHttpClientHttpInvokerRequestExecutor.java:78)

at org.springframework.remoting.httpinvoker.AbstractHttpInvokerRequestExecutor.executeRequest(AbstractHttpInvokerRequestExecutor.java:137)

at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.executeRequest(HttpInvokerClientInterceptor.java:202)

at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.executeRequest(HttpInvokerClientInterceptor.java:184)

at org.springframework.remoting.httpinvoker.HttpInvokerClientInterceptor.invoke(HttpInvokerClientInterceptor.java:150)

... 15 common frames omitted

Caused by: java.net.ConnectException: Connection refused: connect

at java.base/java.net.PlainSocketImpl.connect0(Native Method)

at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101)

at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)

at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)

at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)

at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)

at java.base/java.net.Socket.connect(Socket.java:591)

at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:339)

at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)

... 29 common frames omitted

[James Wright]

Ok fixed it. having upgraded to the latest version ssl/tls support is beginning to be phased out so I changed the server url property to http://10.32.16.225:8153 and all is well.

[Ketan Padegaonkar]

See https://github.com/gocd/docker-gocd-agent-dind/issues/11#issuecomment-597775464

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[Ketan Padegaonkar]

Ignore my response. It was meant to be for another issue.