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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-8127) Region of a disabling or disabled table could be stucked in transition state when RS dies during Master initialization
Date Sat, 16 Mar 2013 23:50:12 GMT

     [ https://issues.apache.org/jira/browse/HBASE-8127?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jeffrey Zhong updated HBASE-8127:
---------------------------------

    Attachment: hbase-8127_v1.patch

The fix is to remove the RIT regions skipping parts becasue the later of function processDeadServersAndRecoverLostRegions
can set internal AM.regionsInTransition correctly and SSH is able to handle RITs of a dead
server.

I haven't run full test suit yet, just propose a fix for reviewing.

Thanks,
-Jeffrey
                
> Region of a disabling or disabled table could be stucked in transition state when RS
dies during Master initialization
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8127
>                 URL: https://issues.apache.org/jira/browse/HBASE-8127
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.5
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>         Attachments: hbase-8127_v1.patch, reproduce-hang.patch
>
>
> The issue happens when a RS dies during a master starts up. After the RS reports open
to the new master instance and dies immediately thereafter, the RITs of disabling tables(or
disabled table) on the died RS will be in RIT state forever.
> I attached a patch to simulate the situation and you can run the following command to
reproduce the issue:
> {code}mvn test -PlocalTests -Dtest=TestMasterFailover#testMasterFailoverWithMockedRITOnDeadRS{code}
> Basically, we skip regions of a dead server inside AM.processDeadServersAndRecoverLostRegions
as the following code and relies on SSH to process those skipped regions:
> {code}
>           for (Pair<HRegionInfo, Result> deadRegion : deadServer.getValue()) {
>             nodes.remove(deadRegion.getFirst().getEncodedName());
>           }
> {code} 
> While in SSH, we skip regions of disabling(or disabled table) again by function processDeadRegion.
Finally comes to the issue that RITs of disabling(or disabled table) stuck there forever.
>  

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