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https://issues.apache.org/jira/browse/HBASE-24323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099420#comment-17099420
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Huaxiang Sun commented on HBASE-24323:
--------------------------------------

I am working on a patch to address it.

> Avoid two parallel running of GCMulitpleMergedRegionsProcedure over the same 
> region.
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-24323
>                 URL: https://issues.apache.org/jira/browse/HBASE-24323
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 3.0.0-alpha-1, 2.3.0, 2.4.0
>            Reporter: Huaxiang Sun
>            Priority: Major
>
> As [~stack] suggested in one of PRs, "This method is called from 
> GCMergedRegionsProcedure and GCMulitpleMergedRegionsProcedure. I was 
> wondering if we took a lock on the Region being Merged would it stop two 
> overlapping GCs happening?"



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