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From "ramkrishna.s.vasudevan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5615) the master never does balance because of balancing the parent region
Date Fri, 06 Apr 2012 04:31:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13248038#comment-13248038
] 

ramkrishna.s.vasudevan commented on HBASE-5615:
-----------------------------------------------

@Lars
I suspect the following problem.
The split of region is done using ZK.  Now suppose just after the RS updated the status of
the region split node to RS_SPLIT and before the master could respond master went down.
Now the master comes up and he will expect the RIT to be populated from the servers map.
But with this patch that servers map is not populated and the RIT is not populated and the
master is not able to process the SPLIT node and the RS keeps saying master yet to process.
 This has to be reverted in all the 0.92+ branches i feel.
Correct me if am wrong. 0.90 is fine.
                
> the master never does balance because of balancing the parent region
> --------------------------------------------------------------------
>
>                 Key: HBASE-5615
>                 URL: https://issues.apache.org/jira/browse/HBASE-5615
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.7
>            Reporter: xufeng
>            Assignee: xufeng
>            Priority: Critical
>             Fix For: 0.90.7, 0.92.2, 0.94.0, 0.96.0
>
>         Attachments: 5615-trunk.txt, HBASE-5615-90.patch, HBASE-5615.patch, NoPatched-surefire-report-5615-90.html,
Patched_surefire-report-5615-90.html
>
>
> the master never do balance becauseof when master do rebuildUserRegions()´╝îit will add
the parent region into  AssignmentManager#servers,
> if balancer let the parent region to move,the parent will in RIT forever.thus balance
will never be executed.

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