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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6227) SSH and cluster startup causes data loss
Date Wed, 27 Jun 2012 23:51:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402683#comment-13402683

Hudson commented on HBASE-6227:

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #72 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/72/])
    HBASE-6227 SSH and cluster startup causes data loss

Submitted by:Chunhui	
Reviewed by:Ram, Ted (Revision 1354634)

     Result = FAILURE
ramkrishna : 
Files : 
* /hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java

> SSH and cluster startup  causes data loss
> -----------------------------------------
>                 Key: HBASE-6227
>                 URL: https://issues.apache.org/jira/browse/HBASE-6227
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.96.0, 0.94.1
>         Attachments: HBASE-6227.patch, HBASE-6227v2-94.patch, HBASE-6227v2.patch
> In AssignmentManager#processDeadServersAndRegionsInTransition, if servershutdownhandler
is processing and master consider it cluster startup, master will assign all user regions,
however, servershutdownhandler has not completed splitting logs.
> Let me describe it in more detail.
> Suppose there are two regionservers A1 and B1, A1 carried META and ROOT
> 1.master restart and completed assignRootAndMeta
> 2.A1 and B1 are both restarted, new regionservers are A2 and B2
> 3.SSH which processed for A1 completed assigning ROOT and META
> 4.master do rebuilding user regions and no regions added to master's region list
> 5.master consider it as a cluster startup, and assign all user regions
> 6.SSH which processed for B1 start to split B1's logs
> 7.All regions' data carried by B1 would loss.

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