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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-11197) Region could remain unassigned if regionserver crashes
Date Mon, 19 May 2014 19:55:40 GMT

     [ https://issues.apache.org/jira/browse/HBASE-11197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jimmy Xiang resolved HBASE-11197.

    Resolution: Invalid

I think it's an issue in my local patch/branch. Close it as Invalid.

> Region could remain unassigned if regionserver crashes
> ------------------------------------------------------
>                 Key: HBASE-11197
>                 URL: https://issues.apache.org/jira/browse/HBASE-11197
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
> When looking into test failure: testVisibilityLabelsOnKillingOfRSContainingLabelsTable
> and find this is what has happened:
> 1. try to assign a region a region server;
> 2. master creates a znode, and send an openRegion request to the rs;
> 3. rs gets the request and sends back a response, then crashed;
> 4. try to assign the region again with forceNewPlan = true;
> 5. since the region is in transition, master tries to close it and get region server
stopped exception;
> 6. master offlines the region and removes it from transition; but can't assign the region
since the dead server is not processed;
> 7. now SSH finally kicks in, tries to assign this region again;
> 8. SSH will fail to assign it since the znode is there already.
> We should clean up the znode in force offline a region.

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