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Bug
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Resolution: Fixed
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Minor
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None
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Jenkins Instance (2.135) with 5 agents all connected using Kafka (no security)
remoting Kafka plugin 1.1, built with remoting 3.23
Using Remoting Kafka Plugin to version 1.1 (changed the pom file to use the remoting.version=3.23 to match the version on my set up)
I've set a Jenkins instance with 5 nodes all connected with kafka. It did run jobs for about 3 days with a considerable load without failures. But today I had the following failure (full log attached):
Error when executing always post condition:hudson.remoting.ChannelClosedException: Channel "unknown": Remote call on daybreakk failed. The channel is closing down or has closed down
The process that I started in the kafka agent with:
> java -jar remoting-kafka-agent.jar -name daybreakk -master http://jenkins:8081/ -secret 6e6c09c25550bd721cef2efba02bfbd54d6306fc711c2482450abb5ee454cd7f -kafkaURL kafka.al.com.au:9093 -noauth
exited without any log.
When I restarted the process, after all the kafka initial logs it printed: (full log attached)
Sep 04, 2018 8:44:47 AM hudson.remoting.ExportTable unexportByOidSEVERE: Trying to unexport an object that's already unexportedjava.util.concurrent.ExecutionException: Invalid object ID 750 iota=2 at hudson.remoting.ExportTable.diagnoseInvalidObjectId(ExportTable.java:478) at hudson.remoting.ExportTable.unexportByOid(ExportTable.java:516) at hudson.remoting.Channel.unexport(Channel.java:803) at hudson.remoting.Channel.unexport(Channel.java:793) at hudson.remoting.UnexportCommand.execute(UnexportCommand.java:49) at hudson.remoting.Channel$1.handle(Channel.java:565) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:87) Sep 04, 2018 8:44:47 AM hudson.remoting.ExportTable unexportByOidSEVERE: 2nd unexport attempt is hereCommand Unexport created at at hudson.remoting.Command.<init>(Command.java:79) at hudson.remoting.Command.<init>(Command.java:62) at hudson.remoting.UnexportCommand.<init>(UnexportCommand.java:35) at hudson.remoting.RemoteInvocationHandler$PhantomReferenceImpl.cleanup(RemoteInvocationHandler.java:393) at hudson.remoting.RemoteInvocationHandler$PhantomReferenceImpl.access$1000(RemoteInvocationHandler.java:352) at hudson.remoting.RemoteInvocationHandler$Unexporter.run(RemoteInvocationHandler.java:610) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:112) at java.lang.Thread.run(Thread.java:745)Caused by: java.lang.Exception: Proxy hudson.remoting.RemoteInvocationHandler@2ee was created for interface hudson.plugins.git.IGitAPI at hudson.remoting.RemoteInvocationHandler.<init>(RemoteInvocationHandler.java:142) at hudson.remoting.RemoteInvocationHandler.wrap(RemoteInvocationHandler.java:161) at hudson.remoting.Channel.export(Channel.java:768) at hudson.remoting.Channel.export(Channel.java:731) at org.jenkinsci.plugins.gitclient.LegacyCompatibleGitAPIImpl.writeReplace(LegacyCompatibleGitAPIImpl.java:198) at sun.reflect.GeneratedMethodAccessor64.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at java.io.ObjectStreamClass.invokeWriteReplace(ObjectStreamClass.java:1218) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1136) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) at hudson.remoting.UserRequest._serialize(UserRequest.java:264) at hudson.remoting.UserRequest.serialize(UserRequest.java:273) at hudson.remoting.UserRequest.perform(UserRequest.java:223) at hudson.remoting.UserRequest.perform(UserRequest.java:54) at hudson.remoting.Request$2.run(Request.java:369) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at io.jenkins.plugins.remotingkafka.Engine$1.lambda$newThread$0(Engine.java:47) at java.lang.Thread.run(Thread.java:748) ... ... ... Sep 04, 2018 8:44:47 AM hudson.remoting.Request$2 runINFO: Failed to send back a reply to the request hudson.remoting.Request$2@7da8bc0d: hudson.remoting.ChannelClosedException: Channel "hudson.remoting.Channel@51a38854:daybreakk": channel is already closed[Thread-2] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka version : 1.1.0[Thread-2] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka commitId : fdcf75ea326b8e07
it printed this repeatedly and it successfully connected at some point.
There were no meaningful logs in the support folder of the Remote root directory (full logs attached)
My expectation was that even if we had an exception like this, the job will not fail due to this cause, and keep waiting until the node gets reconnected and in the worse case, fail due to a timeout.