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https://issues.apache.org/jira/browse/HBASE-12005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139154#comment-14139154
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Jimmy Xiang commented on HBASE-12005:
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Looked into it further. This problem applies to the master branch only since we
have a tight state machine. Branch 1 and 0.98 should be fine.
> 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
>
> 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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