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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4478) Improve AssignmentManager.handleRegion so that it can process certain ZK state in the case of RS offline
Date Thu, 10 Nov 2011 22:39:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148070#comment-13148070
] 

stack commented on HBASE-4478:
------------------------------

+1
                
> Improve AssignmentManager.handleRegion so that it can process certain ZK state in the
case of RS offline
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4478
>                 URL: https://issues.apache.org/jira/browse/HBASE-4478
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ming Ma
>            Assignee: ramkrishna.s.vasudevan
>         Attachments: 4478-v2.txt, HBASE-4478_1.patch
>
>
> Currently AssignmentManager.handleRegion skips processing of ZK event change if the RS
is offline. It relies on TimeoutMonitor and ServerShutdownHandler to process RIT.
>       // Verify this is a known server
>       if (!serverManager.isServerOnline(sn) &&
>           !this.master.getServerName().equals(sn)) {
>         LOG.warn("Attempted to handle region transition for server but " +
>           "server is not online: " + Bytes.toString(data.getRegionName()));
>         return;
>       }
> For certain states like OPENED, OPENING, FAILED_OPEN, CLOSED, it can continue the progressing
even if the RS is offline.

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