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https://issues.apache.org/jira/browse/HBASE-6611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455136#comment-13455136
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Jimmy Xiang commented on HBASE-6611:
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Sure, I will do that to make sure existing function is not broken, and there is
no substantial performance drop.
Another thing I'd like to address in this jira is that bulk assigning currently
doesn't pass the offlined ZK node version to region server as regular
assignment does. I think it is needed to avoid competing assigning the same
region at the same time.
> 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
>
>
> 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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