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https://issues.apache.org/jira/browse/HBASE-12936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295720#comment-14295720
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Vandana Ayyalasomayajula commented on HBASE-12936:
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The test case for merge should have a scenario when merge operation fails.  
Other than that the patch looks good. Thanks [~tedyu]

> Quota support for namespace should take region merge into account
> -----------------------------------------------------------------
>
>                 Key: HBASE-12936
>                 URL: https://issues.apache.org/jira/browse/HBASE-12936
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 12936-002.txt, 12936-003.txt
>
>
> HBASE-8410 added basic quota support for namespaces.
> However, region merge operation was not taken into account. This means, once 
> region count limit is reached, user table cannot be split even after some 
> regions are successfully merged.
> This issue fixes the bug by adding hook in RegionStateListener for region 
> merged event.



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