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From "stack (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4881) Unhealthy region is on service caused by rollback of region splitting
Date Mon, 12 Dec 2011 19:27:31 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack resolved HBASE-4881.
--------------------------

       Resolution: Fixed
    Fix Version/s: 0.92.0
         Assignee: chunhui shen
     Hadoop Flags: Reviewed

Committed trunk and 0.92 branch.  Thank you for the patch Chunhui.
                
> Unhealthy region is on service caused by rollback of region splitting
> ---------------------------------------------------------------------
>
>                 Key: HBASE-4881
>                 URL: https://issues.apache.org/jira/browse/HBASE-4881
>             Project: HBase
>          Issue Type: Bug
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.92.0
>
>         Attachments: 4881-v2.txt, hbase-4881.patch
>
>
> If region splitting is failed in the state of JournalEntry.CLOSED_PARENT_REGION
> It will be rollback as the following steps:
> {code}
> 1.case CLOSED_PARENT_REGION:
>   this.parent.initialize();
>         break;
> 2.case CREATE_SPLIT_DIR:
>     	this.parent.writestate.writesEnabled = true;
>         cleanupSplitDir(fs, this.splitdir);
>         break;
> 3.case SET_SPLITTING_IN_ZK:
>         if (server != null && server.getZooKeeper() != null) {
>           cleanZK(server, this.parent.getRegionInfo());
>         }
>         break;
> {code}
> If this.parent.initialize() throws IOException in step 1,
> If check filesystem is ok. it will do nothing.
> However, the parent region is on service now.

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