Help with JNLP-agent lost connections, Nothing on Google helps.

[ruslan]

Hi Everbody

I am fighting with this about 2 weeks and so far no any success. 

I have read dozen answers on internet about similar troubles - nothing helps.

I have upgrade today Java on master and all windows-slave machines to latest 8_211, not helps.

Jenkins also is latest 2.183 and all plugins up to date.

** So, problem is that windows-slave machines SOMETIMES get closed JNLP connection.

The same machines sometimes are able to execute job with success.

** May be jenkins-gurus can check Exception-stack below and point where to search?

** This failure happens at any time at any place of a job. 

** MASTER computer is Mac OS X

** We have around few windows computers (mostly VM on virtual Box,) 

    few Linux machines (also virtual bog) and few Macs - physical macs are used.

** Linux and Mac works fine.

** For years Windows also was fine, glitches have started about 2 weeks ago,

    On that day we was yet on 2.163

=========================

FATAL: command execution failed
java.nio.channels.ClosedChannelException
	at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154)
	at org.jenkinsci.remoting.protocol.impl.NIONetworkLayer.ready(NIONetworkLayer.java:179)
	at org.jenkinsci.remoting.protocol.IOHub$OnReady.run(IOHub.java:795)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused: java.io.IOException: Backing channel 'JNLP4-connect connection from 192.168.2.160/192.168.2.160:1112' is disconnected.
	at hudson.remoting.RemoteInvocationHandler.channelOrFail(RemoteInvocationHandler.java:214)
	at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:283)
	at com.sun.proxy.$Proxy81.isAlive(Unknown Source)
	at hudson.Launcher$RemoteLauncher$ProcImpl.isAlive(Launcher.java:1150)
	at hudson.Launcher$RemoteLauncher$ProcImpl.join(Launcher.java:1142)
	at hudson.tasks.CommandInterpreter.join(CommandInterpreter.java:155)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:109)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
	at hudson.model.Build$BuildExecution.build(Build.java:206)
	at hudson.model.Build$BuildExecution.doRun(Build.java:163)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
	at hudson.model.Run.execute(Run.java:1818)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)
FATAL: Unable to delete script file C:\Users\Ruslan\AppData\Local\Temp\jenkins4887328775441465037.bat
java.nio.channels.ClosedChannelException
	at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154)
	at org.jenkinsci.remoting.protocol.impl.NIONetworkLayer.ready(NIONetworkLayer.java:179)
	at org.jenkinsci.remoting.protocol.IOHub$OnReady.run(IOHub.java:795)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused: hudson.remoting.ChannelClosedException: Channel "unknown": Remote call on JNLP4-connect connection from 192.168.2.160/192.168.2.160:1112 failed. The channel is closing down or has closed down
	at hudson.remoting.Channel.call(Channel.java:950)
	at hudson.FilePath.act(FilePath.java:1072)
	at hudson.FilePath.act(FilePath.java:1061)
	at hudson.FilePath.delete(FilePath.java:1542)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:123)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:66)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:741)
	at hudson.model.Build$BuildExecution.build(Build.java:206)
	at hudson.model.Build$BuildExecution.doRun(Build.java:163)
	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
	at hudson.model.Run.execute(Run.java:1818)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:97)
	at hudson.model.Executor.run(Executor.java:429)

[LnT]

Eagerly , I'm waiting for the root cause and resolution ....

[Björn Pedersen]

Current Weekly ( that is what it seems you are using) is 2.257 now. There were some changes to remoting, so make sure  the agent.jar on the the client machines is up-to-date  as well. 

And how do you connect to the windows clients? Running it as a windows service, manually starting it , ssh ???

Björn