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https://issues.apache.org/jira/browse/HBASE-6611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13478944#comment-13478944
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ramkrishna.s.vasudevan commented on HBASE-6611:
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Now i am also getting in sync with AM code in trunk..Thanks to Jimmy for making
it more reliable.
> Forcing region state offline cause double assignment
> ----------------------------------------------------
>
> Key: HBASE-6611
> URL: https://issues.apache.org/jira/browse/HBASE-6611
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Fix For: 0.96.0
>
> Attachments: trunk-6611_v2.patch
>
>
> In assigning a region, assignment manager forces the region state offline if
> it is not. This could cause double assignment, for example, if the region is
> already assigned and in the Open state, you should not just change it's state
> to Offline, and assign it again.
> I think this could be the root cause for all double assignments IF the region
> state is reliable.
> After this loophole is closed, TestHBaseFsck should come up a different way
> to create some assignment inconsistencies, for example, calling region server
> to open a region directly.
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