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https://issues.apache.org/jira/browse/HBASE-19989?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16379660#comment-16379660
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Hudson commented on HBASE-19989:
--------------------------------

SUCCESS: Integrated in Jenkins build HBase-1.3-IT #362 (See 
[https://builds.apache.org/job/HBase-1.3-IT/362/])
HBASE-19989 Addendum - temp override for tests to be added later for (apurtell: 
rev d74f8f019b76814ef9c99c2850d2f040e9bd9222)
* (edit) 
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestZKLessSplitOnCluster.java
* (edit) 
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestZKLessMergeOnCluster.java


> READY_TO_MERGE and READY_TO_SPLIT do not update region state correctly
> ----------------------------------------------------------------------
>
>                 Key: HBASE-19989
>                 URL: https://issues.apache.org/jira/browse/HBASE-19989
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.3.1, 1.4.1
>            Reporter: Ben Lau
>            Assignee: Ben Lau
>            Priority: Major
>             Fix For: 1.3.2, 1.5.0, 1.4.3
>
>         Attachments: HBASE-19989-ADDENDUM-branch-1.patch, 
> HBASE-19989-branch-1.patch
>
>
> Region state transitions do not work correctly for READY_TO_MERGE/SPLIT.  
> [~thiruvel] and I noticed this is due to break statements being in the wrong 
> place in AssignmentManager.  This allows a race condition for example in 
> which one of the regions being merged could be moved concurrently, resulting 
> in the merge transaction failing and then double assignment and/or dataloss.  
> This bug appears to only affect branch-1 (for example 1.3 and 1.4) and not 
> branch-2 as the relevant code in AM has since been rewritten.



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