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https://issues.apache.org/jira/browse/HBASE-12005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14140909#comment-14140909
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stack commented on HBASE-12005:
-------------------------------

bq. We can check them together.

You don't have to. Just add note that could be individually null?

+1 on helper method.  Then +1 on patch. Just go for it I'd say Jimmy.

> Split/merge fails if master restarts before PONR
> ------------------------------------------------
>
>                 Key: HBASE-12005
>                 URL: https://issues.apache.org/jira/browse/HBASE-12005
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>         Attachments: hbase-12005.patch, hbase-12005_v1.1.patch
>
>
> This applies to RPC based assignment. The root cause is that we don't persist 
> the state of the new region(s). If we do persist it, we need to clean it up 
> if the split/merge fails.



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