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Date: Sat, 20 Aug 2011 06:33:27 +0000 (UTC)
From: "gaojinchao (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-4124) ZK restarted while assigning a
 region, new active HM re-assign it but the RS warned 'already online on
 this server'.
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    [ https://issues.apache.org/jira/browse/HBASE-4124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13088146#comment-13088146 ] 

gaojinchao commented on HBASE-4124:
-----------------------------------

I have finished the test. I discribe the scene:
step 1: startup cluster 
step 2: abort the master when finish call "sendRegionOpen(destination, regions)"
step 3: startup cluster again.

above steps will reproduce the issue. 
when master is failover. the meta records the dead server,but the region is processing for a living region server.


> ZK restarted while assigning a region, new active HM re-assign it but the RS warned 'already online on this server'.
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4124
>                 URL: https://issues.apache.org/jira/browse/HBASE-4124
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: fulin wang
>         Attachments: HBASE-4124_Branch90V1_trial.patch, HBASE-4124_Branch90V2.patch, log.txt
>
>   Original Estimate: 0.4h
>  Remaining Estimate: 0.4h
>
> ZK restarted while assigning a region, new active HM re-assign it but the RS warned 'already online on this server'.
> Issue:
> The RS failed besause of 'already online on this server' and return; The HM can not receive the message and report 'Regions in transition timed out'.

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