Seeing ChannelClosed or Workspace not available errors seemingly randomly when using ECS containers.

Considerations:

• Cluster load does not appear to be a factor
• Jenkins server and cluster exist in the same VPC
• pingIntervalSeconds using default 300 seconds
• pingTimeoutSeconds using default 240 seconds
• Unable to reproduce the issue reliably
• Not other network issues seen at similar times with nodes in EC2
• Length of build/task does not appear to be a factor

I know this is a horribly vague bug to resolve, so I'm quite happy to try any reconfiguration or similar suggested.

code

FATAL: java.nio.channels.ClosedChannelException
java.nio.channels.ClosedChannelException
Also: hudson.remoting.Channel$CallSiteStackTrace: Remote call to JNLP4-connect connection from ip-10-1-0-187.ec2.internal/10.1.0.187:43840
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1741)
at hudson.remoting.Request.call(Request.java:202)
at hudson.remoting.Channel.call(Channel.java:954)
at hudson.Launcher$RemoteLauncher.kill(Launcher.java:1078)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:510)
at com.tikal.jenkins.plugins.multijob.MultiJobBuild$MultiJobRunnerImpl.run(MultiJobBuild.java:148)
at hudson.model.Run.execute(Run.java:1794)
at com.tikal.jenkins.plugins.multijob.MultiJobBuild.run(MultiJobBuild.java:76)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
Caused: hudson.remoting.RequestAbortedException
at hudson.remoting.Request.abort(Request.java:340)
at hudson.remoting.Channel.terminate(Channel.java:1038)
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$Ptr.onRecvClosed(ProtocolStack.java:832)
at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:287)
at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:172)
at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832)
at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154)
at org.jenkinsci.remoting.protocol.impl.NIONetworkLayer.ready(NIONetworkLayer.java:142)
at org.jenkinsci.remoting.protocol.IOHub$OnReady.run(IOHub.java:789)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
code

code
INFO: No logs found
Jun 11, 2018 11:34:32 PM jenkins.slaves.DefaultJnlpSlaveReceiver channelClosed
WARNING: IOHub#1: Worker[channel:java.nio.channels.SocketChannel[connected local=/10.1.0.85:7300 remote=ip-10-1-0-187.
ec2.internal/10.1.0.187:43840]] / Computer.threadPoolForRemoting 1796 for ecs-rdkcmf-12377045296774 terminated
java.nio.channels.ClosedChannelException
at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154)
at org.jenkinsci.remoting.protocol.impl.NIONetworkLayer.ready(NIONetworkLayer.java:142)
at org.jenkinsci.remoting.protocol.IOHub$OnReady.run(IOHub.java:789)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Jun 11, 2018 11:34:33 PM jenkins.plugins.slack.StandardSlackService publish
code