[jboss-jira] [JBoss JIRA] (WFLY-13444) Observing High CPU in EPollArrayWrapper.epollCtl default I/O thread

[Srinivas ev (Jira)]

    [ https://issues.redhat.com/browse/WFLY-13444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089815#comment-14089815 ] 

Srinivas ev edited comment on WFLY-13444 at 5/11/20 2:13 AM:
-------------------------------------------------------------

Hi [~pferraro], 
Just added below snapshot using visual VM. Let me know in case if anything needs to be addressed for avoiding this thread invocation in Wildfly. Not sure why this thread is triggered.

 !stack trace from snapshot.PNG|thumbnail! 



was (Author: ev.srinivas):
Hi [~pferraro], 
Just added below snapshot using visual VM. Let me know in case if anything needs to be addressed for avoiding this thread invocation in Wildfly. Not sure who is triggering this thread.

 !stack trace from snapshot.PNG|thumbnail! 


> Observing High CPU in EPollArrayWrapper.epollCtl default I/O thread
> -------------------------------------------------------------------
>
>                 Key: WFLY-13444
>                 URL: https://issues.redhat.com/browse/WFLY-13444
>             Project: WildFly
>          Issue Type: Bug
>          Components: Clustering, IO
>    Affects Versions: 10.1.0.Final
>            Reporter: Srinivas ev
>            Assignee: Paul Ferraro
>            Priority: Blocker
>         Attachments: IO thread memory.PNG, IO thread.PNG, Thread consuming high CPU.PNG, ThreadDump1set.zip, ThreadDump2set.zip, stack trace from snapshot.PNG, stack trace in thread dump.PNG, top command output.PNG
>
>
> Facing high CPU by one of the default I/O thread In Wildfly 10.1.0 Final. Looks none of our application component thread is consuming.
> Can somebody check what is triggering this issue? I attached the thread stack to this Jira. This is blocking our releases. When the CPU cores are high in number, multiple default I/O threads will kick in consuming the CPU in 90~100% range continuously.
> Wildfly 10.1.0 Final
> Java - 
> openjdk version "1.8.0_232"
> OpenJDK Runtime Environment (build 1.8.0_232-b09)
> OpenJDK 64-Bit Server VM (build 25.232-b09, mixed mode
> ---------------------------------------------------------------------------------------------------
> at java.lang.Throwable.fillInStackTrace(Native Method)
> at java.lang.Throwable.fillInStackTrace(Throwable.java:784)
> at java.lang.Throwable.<init>(Throwable.java:251)
> at java.lang.Exception.<init>(Exception.java:54)
> at java.io.IOException.<init>(IOException.java:47)
> at java.nio.channels.ClosedChannelException.<init>(ClosedChannelException.java:52)
> at org.xnio.ssl.JsseStreamConduit.write(JsseStreamConduit.java:1022)
> at org.xnio.conduits.ConduitStreamSinkChannel.write(ConduitStreamSinkChannel.java:150)
> at org.xnio.http.HttpUpgrade$HttpUpgradeState$StringWriteListener.handleEvent(HttpUpgrade.java:385)
> at org.xnio.http.HttpUpgrade$HttpUpgradeState$StringWriteListener.handleEvent(HttpUpgrade.java:372)
> at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
> at org.xnio.conduits.WriteReadyHandler$ChannelListenerHandler.writeReady(WriteReadyHandler.java:65)
> at org.xnio.ssl.JsseStreamConduit.run(JsseStreamConduit.java:393)
> at org.xnio.ssl.JsseStreamConduit.readReady(JsseStreamConduit.java:547)
> at org.xnio.ssl.JsseStreamConduit$2.readReady(JsseStreamConduit.java:319)
> at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:89)
> at org.xnio.nio.WorkerThread.run(WorkerThread.java:567)
> -------------------------------------------------------------------------------------------
> at sun.nio.ch.EPollArrayWrapper.epollCtl(Native Method)
> at sun.nio.ch.EPollArrayWrapper.updateRegistrations(EPollArrayWrapper.java:299)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:268)
> at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
> at org.xnio.nio.WorkerThread.run(WorkerThread.java:515)
> -----------------------------------------------------------------------------------



--
This message was sent by Atlassian Jira
(v7.13.8#713008)