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Posted to issues@hbase.apache.org by "Ben Lau (JIRA)" <ji...@apache.org> on 2018/02/13 02:13:00 UTC

[jira] [Created] (HBASE-19989) READY_TO_MERGE and READY_TO_SPLIT do not update region state correctly

Ben Lau created HBASE-19989:
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             Summary: 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: 1.4.1, 1.3.1
            Reporter: Ben Lau
            Assignee: Ben Lau


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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