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Date: Wed, 16 May 2012 15:37:02 +0000 (UTC)
From: "Jonathan Hsieh (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-6018) hbck fails with a
 RejectedExecutionException
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    [ https://issues.apache.org/jira/browse/HBASE-6018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13276813#comment-13276813 ] 

Jonathan Hsieh commented on HBASE-6018:
---------------------------------------

When there are < MAX_NUM_THREADS regions, the SynchronousQueue version works, when it there are > MAX_NUM_THREADS regions it fails with the RejectedExectionException.

A workaround is to add hbase-site.xml hbasefsck.numthreads property set to a value larger than the number of regions in your hbase instance.  (you can purposely set it low to trigger the problem).

                
> hbck fails with a RejectedExecutionException
> --------------------------------------------
>
>                 Key: HBASE-6018
>                 URL: https://issues.apache.org/jira/browse/HBASE-6018
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.1, 0.94.0
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>         Attachments: hbase-6018.patch
>
>
> On a long running job 0.94.0rc3 cluster, we get to a point where hbck consistently encounters this error and fails:
> {code}
> Exception in thread "main" java.util.concurrent.RejectedExecutionException
> 	at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1768)
> 	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767)
> 	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.loadHdfsRegionInfos(HBaseFsck.java:633)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.onlineConsistencyRepair(HBaseFsck.java:354)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.onlineHbck(HBaseFsck.java:382)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.main(HBaseFsck.java:3120)
> {code}

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