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From "James E. King, III (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (THRIFT-4251) Epoll Selector Bug
Date Thu, 21 Sep 2017 19:50:03 GMT

     [ https://issues.apache.org/jira/browse/THRIFT-4251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James E. King, III resolved THRIFT-4251.
----------------------------------------
       Resolution: Fixed
         Assignee: James E. King, III
    Fix Version/s: 0.11.0

Committed, thanks for the fix.

> Epoll Selector Bug
> ------------------
>
>                 Key: THRIFT-4251
>                 URL: https://issues.apache.org/jira/browse/THRIFT-4251
>             Project: Thrift
>          Issue Type: Bug
>          Components: Java - Compiler, Java - Library
>    Affects Versions: 0.10.0
>         Environment: Linux version 3.10.0-327.el7.x86_64 (builder@kbuilder.dev.centos.org)
> java version "1.8.0_131"
>            Reporter: JohnnyLiao
>            Assignee: James E. King, III
>              Labels: epoll, jdk, selector
>             Fix For: 0.11.0
>
>
> Thrift java unsolve the infamous epoll bug. It's consum 100% cpu resource when this occured.
It seems to affect any NIO based Java server applications running in the specified environment.
Some projects provide workarounds for similar JDK bugs, for example replaces the current Selector
of this SelectorThread.select with newly created Selector.
> Stack Traceļ¼š
> "Thread-46" #95 prio=5 os_prio=0 tid=0x00007fc79cd02800 nid=0xb1 runnable [0x00007fc580bd1000]
>    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:93)
>         at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
>         - locked <0x000000008012f748> (a sun.nio.ch.Util$3)
>         - locked <0x000000008012f738> (a java.util.Collections$UnmodifiableSet)
>         - locked <0x0000000080120f58> (a sun.nio.ch.EPollSelectorImpl)
>         at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
>         at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
>         at org.apache.thrift.server.TThreadedSelectorServer$SelectorThread.select(TThreadedSelectorServer.java:570)
>         at org.apache.thrift.server.TThreadedSelectorServer$SelectorThread.run(TThreadedSelectorServer.java:541)



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