[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=13010047#comment-13010047 ] 

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

Hi Steven

I have talked with norman that seems netty 3.6.x have this issue(DV 6.0 use netty 3.6.6, DV 6.1 use netty 3.6.7), not sure other versions.

Teiid 8.7.x use bom to contorl netty version,  as Bugzilla updates, the issue being handled in wildfly and EAP upstream, no changes are needed in teiid side.

Netty 3.6.10 has been released(https://github.com/netty/netty/releases/tag/netty-3.6.10.Final), for current master netty 8.9, I think we can update netty version to 3.6.10 directly.




> 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



--
This message was sent by Atlassian JIRA
(v6.3.1#6329)