[teiid-issues] [JBoss JIRA] (TEIID-3070) Netty worker threads cause system high cpu

[Kylin Soong (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-3070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000257#comment-13000257 ] 

Kylin Soong commented on TEIID-3070:
------------------------------------

Norman have a fix https://github.com/netty/netty/pull/2868, we need upgrade netty after norman add the fix to a final release.

> Netty worker threads cause system high cpu
> ------------------------------------------
>
>                 Key: TEIID-3070
>                 URL: https://issues.jboss.org/browse/TEIID-3070
>             Project: Teiid
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 8.7
>         Environment: JDV 6.1.0.DR2 
> JDV 6.0
>            Reporter: Kylin Soong
>            Assignee: Kylin Soong
>
> I have hit this issue many times in deploying a VDB to JDV, All CPU  be used by netty worker threads:
> ~~~
> "New I/O worker #3" daemon prio=10 tid=0x00007fc71c0d2000 nid=0x320b runnable [0x00007fc7074f3000]
>    java.lang.Thread.State: RUNNABLE
>         at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
>         at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
>         at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79)
>         at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:87)
>         - locked <0x00000000c42b4318> (a sun.nio.ch.Util$2)
>         - locked <0x00000000c42b4328> (a java.util.Collections$UnmodifiableSet)
>         - locked <0x00000000c42b42d0> (a sun.nio.ch.EPollSelectorImpl)
>         at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:98)
>         at org.jboss.netty.channel.socket.nio.SelectorUtil.select(SelectorUtil.java:64)
> ~~~
> Seems this is a exist netty issue, search "jboss netty high cpu" via google we can get lots of result.
> Below link have detailed depiction about this issue;
> https://github.com/kylinsoong/teiid-samples/tree/master/highcpu



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