[JIRA] (JENKINS-58700) java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Connection closed before acknowledgement sent

[cw....@asmpt.com (JIRA)]

Title: Message Title

Chu CW created an issue   Jenkins / JENKINS-58700 java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Connection closed before acknowledgement sent Issue Type: Bug Assignee: Unassigned Components: core Created: 2019-07-29 08:50 Environment: Jenkins version: 2.121.3 OS: Windows Server 2012 R2 Standard Java version 1.8.0_111 Labels: jnlp slave slave-agent network Priority: Blocker Reporter: Chu CW Hi our Jenkins server is facing following issues for around one month,but there is no updates/installation of plugins for Jenkins. The issue is the slaves(~10-20) can be connected to server normally at the beginning, with calling command 'java -jar agent.jar -jnlpurl ......'. And all of them will suddenly disconnected at the same time. But it is confirmed that the network connection of both server and slaves are normal, and 'ping'ing each other are success too.   Here is the logging. Server logging: Jul 26, 2019 6:19:17 PM hudson.slaves.ChannelPinger$1 onDead INFO: Ping failed. Terminating the channel JNLP4-connect connection from vis_test25_10_1.ahkex.asmpt.com/10.0.120.128:58639. java.util.concurrent.TimeoutException: Ping started at 1564136117631 hasn't completed by 1564136357652 at hudson.remoting.PingThread.ping(PingThread.java:134) at hudson.remoting.PingThread.run(PingThread.java:90) Jul 26, 2019 6:19:17 PM jenkins.slaves.DefaultJnlpSlaveReceiver channelClosed WARNING: Computer.threadPoolForRemoting 9322 for vis_test25_10_1 terminated java.nio.channels.ClosedChannelException at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer.onReadClosed(ChannelApplicationLayer.java:209) at org.jenkinsci.remoting.protocol.ApplicationLayer.onRecvClosed(ApplicationLayer.java:222) at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832) at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:287) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:181) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.switchToNoSecure(SSLEngineFilterLayer.java:283) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processWrite(SSLEngineFilterLayer.java:503) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.processQueuedWrites(SSLEngineFilterLayer.java:248) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doSend(SSLEngineFilterLayer.java:200) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.doCloseSend(SSLEngineFilterLayer.java:213) at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.doCloseSend(ProtocolStack.java:800) at org.jenkinsci.remoting.protocol.ApplicationLayer.doCloseWrite(ApplicationLayer.java:173) at org.jenkinsci.remoting.protocol.impl.ChannelApplicationLayer$ByteBufferCommandTransport.closeWrite(ChannelApplicationLayer.java:314) at hudson.remoting.Channel.close(Channel.java:1450) at hudson.remoting.Channel.close(Channel.java:1403) at hudson.slaves.SlaveComputer.closeChannel(SlaveComputer.java:799) at hudson.slaves.SlaveComputer.access$800(SlaveComputer.java:103) at hudson.slaves.SlaveComputer$3.run(SlaveComputer.java:715) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Slave Logging: Jul 26, 2019 6:21:18 PM hudson.remoting.jnlp.Main$CuiListener error SEVERE: Failed to connect to ahknts34b:63560 java.io.IOException: Failed to connect to ahknts34b:63560 at org.jenkinsci.remoting.engine.JnlpAgentEndpoint.open(JnlpAgentEndpoint.java:242) at hudson.remoting.Engine.connect(Engine.java:686) at hudson.remoting.Engine.innerRun(Engine.java:547) at hudson.remoting.Engine.run(Engine.java:469) Caused by: java.net.ConnectException: Connection refused: connect at sun.nio.ch.Net.connect0(Native Method) at sun.nio.ch.Net.connect(Unknown Source) at sun.nio.ch.Net.connect(Unknown Source) at sun.nio.ch.SocketChannelImpl.connect(Unknown Source) at java.nio.channels.SocketChannel.open(Unknown Source) at org.jenkinsci.remoting.engine.JnlpAgentEndpoint.open(JnlpAgentEndpoint.java:203) ... 3 more   Add Comment   This message was sent by Atlassian Jira (v7.11.2#711002-sha1:fdc329d) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-issues/JIRA.200989.1564390210000.2537.1564390320001%40Atlassian.JIRA.