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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14407) NotServingRegion: hbase region closed forever
Date Fri, 18 Sep 2015 22:50:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876626#comment-14876626
] 

Ted Yu commented on HBASE-14407:
--------------------------------

lgtm

> NotServingRegion: hbase region closed forever
> ---------------------------------------------
>
>                 Key: HBASE-14407
>                 URL: https://issues.apache.org/jira/browse/HBASE-14407
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>    Affects Versions: 0.98.10, 1.2.0, 1.1.2, 1.3.0
>            Reporter: Shuaifeng Zhou
>            Assignee: Shuaifeng Zhou
>            Priority: Critical
>         Attachments: 14407-branch-1.2.patch, hbase-14407-0.98.patch, hbase-14407-1.1.patch,
hbase-14407-1.2.patch, hs4.log, master.log
>
>
>     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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