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Date: Fri, 11 Sep 2015 05:47:45 +0000 (UTC)
From: "Shuaifeng Zhou (JIRA)" <jira@apache.org>
To: dev@hbase.apache.org
Message-ID: <JIRA.12863291.1441950432000.310779.1441950465903@Atlassian.JIRA>
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Subject: [jira] [Created] (HBASE-14407) NotServingRegion: hbase region
 closed forever
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Shuaifeng Zhou created HBASE-14407:
--------------------------------------

             Summary: NotServingRegion: hbase region closed forever
                 Key: HBASE-14407
                 URL: https://issues.apache.org/jira/browse/HBASE-14407
             Project: HBase
          Issue Type: Bug
            Reporter: Shuaifeng Zhou
            Assignee: Shuaifeng Zhou
             Fix For: 1.1.2, 0.98.10


    I found a situation may cause region closed forever, and this situation happend usually on my cluster, version is 0.98.10, but 1.1.2 also have the problem:
    1, master send region open to regionserver
    2, rs open a handler do openregion
    3, rs return resopnse to master
    3, master not received the response, or timeout, send open region again
    4, rs already opened the region
    5, master processAlreadyOpenedRegion, update regionstate open in master memory
    6, master received zk message region opened(for some reason late, eg: net work), and triger update regionstate open, but find that region already opened, ERROR!
    7, master send close region, and region be closed forever.


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