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https://issues.apache.org/jira/browse/HADOOP-7304?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ramkrishna.s.vasudevan updated HADOOP-7304:
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Affects Version/s: 0.20-append
> BackUpNameNode is using 100% CPU and not accepting any requests.
> -----------------------------------------------------------------
>
> Key: HADOOP-7304
> URL: https://issues.apache.org/jira/browse/HADOOP-7304
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 0.20-append, 0.21.0
> Reporter: ramkrishna.s.vasudevan
> Fix For: 0.20-append
>
>
> In our environment, Backup NameNode is using 100% CPU and not accepting any
> calls in 3days long run.
> Thread dump
> "IPC Server Responder" daemon prio=10 tid=0x00007f86c41c6800 nid=0x3b2a
> runnable [0x00007f86ce579000]
> java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:215)
> at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> locked <0x00007f86d67e2a20> (a sun.nio.ch.Util$1)
> locked <0x00007f86d67e2a08> (a java.util.Collections$UnmodifiableSet)
> locked <0x00007f86d67e26a8> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at org.apache.hadoop.ipc.Server$Responder.run(Server.java:501)
> Looks like same issue occurred in jetty also.
> http://jira.codehaus.org/browse/JETTY-937
>
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