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Date: Tue, 5 Jun 2012 17:38:24 +0000 (UTC)
From: "ramkrishna.s.vasudevan (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HBASE-6046) Master retry on ZK session expiry
 causes inconsistent region assignments.
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     [ https://issues.apache.org/jira/browse/HBASE-6046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ramkrishna.s.vasudevan updated HBASE-6046:
------------------------------------------

    Attachment: HBASE_6046_0.92.patch

0.92 patch.
                
> Master retry on ZK session expiry causes inconsistent region assignments.
> -------------------------------------------------------------------------
>
>                 Key: HBASE-6046
>                 URL: https://issues.apache.org/jira/browse/HBASE-6046
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>    Affects Versions: 0.92.1, 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: HBASE_6046-trunk.patch, HBASE_6046_0.92.patch, HBASE_6046_0.94.patch, HBASE_6046_0.94_1.patch, HBASE_6046_0.94_2.patch, HBASE_6046_0.94_3.patch
>
>
> 1> ZK Session timeout in the hmaster leads to bulk assignment though all the RSs are online.
> 2> While doing bulk assignment, if the master again goes down & restart(or backup comes up) all the node created in the ZK will now be tried to reassign to the new RSs. This is leading to double assignment.
> we had 2800 regions, among this 1900 region got double assignment, taking the region count to 4700. 

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