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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6346) Observed excessive CPU on "quiescent" cluster
Date Sat, 07 Jul 2012 00:03:33 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408466#comment-13408466
] 

Andrew Purtell commented on HBASE-6346:
---------------------------------------

This is repeatable, any cluster I start shows this behavior. I started seeing this last week,
but took various steps first like switching from JRE 7u4 back to 6u33.
                
> Observed excessive CPU on "quiescent" cluster
> ---------------------------------------------
>
>                 Key: HBASE-6346
>                 URL: https://issues.apache.org/jira/browse/HBASE-6346
>             Project: HBase
>          Issue Type: Bug
>         Environment: Hadoop 2.0.1-alpha, HBase 0.94.1-SNAPSHOT
>            Reporter: Andrew Purtell
>         Attachments: graph.gif, jstack.txt, runnable_cpu_profile.png
>
>
> I've only started looking at this but became concerned when a completely quiescent cluster
loads up 20% CPU (system+user) once HBase comes up.

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