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Date: Thu, 12 Jul 2012 00:11:34 +0000 (UTC)
From: "Lars Hofhansl (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-6317) Master clean start up and Partially
 enabled tables make region assignment inconsistent.
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    [ https://issues.apache.org/jira/browse/HBASE-6317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412390#comment-13412390 ] 

Lars Hofhansl commented on HBASE-6317:
--------------------------------------

@rajeshbabu: could you reply to Stacks comments?
Need to push 0.94.1.
                
> Master clean start up and Partially enabled tables make region assignment inconsistent.
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-6317
>                 URL: https://issues.apache.org/jira/browse/HBASE-6317
>             Project: HBase
>          Issue Type: Bug
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: rajeshbabu
>             Fix For: 0.92.2, 0.96.0, 0.94.1
>
>         Attachments: HBASE-6317_94.patch
>
>
> If we have a  table in partially enabled state (ENABLING) then on HMaster restart we treat it as a clean cluster start up and do a bulk assign.  Currently in 0.94 bulk assign will not handle ALREADY_OPENED scenarios and it leads to region assignment problems.  Analysing more on this we found that we have better way to handle these scenarios.
> {code}
> if (false == checkIfRegionBelongsToDisabled(regionInfo)
>             && false == checkIfRegionsBelongsToEnabling(regionInfo)) {
>           synchronized (this.regions) {
>             regions.put(regionInfo, regionLocation);
>             addToServers(regionLocation, regionInfo);
>           }
> {code}
> We dont add to regions map so that enable table handler can handle it.  But as nothing is added to regions map we think it as a clean cluster start up.
> Will come up with a patch tomorrow.

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