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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-616) " We slept XXXXXX ms, ten times longer than scheduled: 3000" happens frequently.
Date Thu, 27 Nov 2008 02:10:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651223#action_12651223
] 

stack commented on HBASE-616:
-----------------------------

Moved to 0.19 because we're starting to get a handle on this issue.  Could be root of HBASE-900
too among other things (Lots of long GC'ing provoking OOME).

> " We slept XXXXXX ms, ten times longer than scheduled: 3000" happens frequently.
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-616
>                 URL: https://issues.apache.org/jira/browse/HBASE-616
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.19.0
>
>
> Just saw the below in a log... all in a row on the one server.
> {code}
>    4493 2008-05-05 18:08:17,512 WARN org.apache.hadoop.hbase.util.Sleeper: We slept 34557ms,
ten times longer than scheduled: 3000
>    4494 2008-05-05 18:11:08,879 WARN org.apache.hadoop.hbase.util.Sleeper: We slept 30576ms,
ten times longer than scheduled: 3000
>    4495 2008-05-05 18:30:45,056 WARN org.apache.hadoop.hbase.util.Sleeper: We slept 1091720ms,
ten times longer than scheduled: 3000
>    4496 2008-05-05 18:30:45,056 WARN org.apache.hadoop.hbase.util.Sleeper: We slept 1094209ms,
ten times longer than scheduled: 10000
>    4497 2008-05-05 18:30:45,429 FATAL org.apache.hadoop.hbase.HRegionServer: unable to
report to master for 1092093 milliseconds - aborting server
> {code}
> We're seeing these kinda outages pretty frequently.  In the case above, it was small
cluster that was using TableReduce to insert.  The MR, HDFS and HBase were all running on
same nodes.

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