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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-19989) READY_TO_MERGE and READY_TO_SPLIT do not update region state correctly
Date Wed, 28 Feb 2018 01:47:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-19989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-19989.
------------------------------------
    Resolution: Fixed

Pushed addendum to branch-1.3, branch-1.4, and branch-1

> 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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