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From "Ted Yu (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4308) Race between RegionOpenedHandler and AssignmentManager
Date Tue, 22 Nov 2011 17:54:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13155299#comment-13155299
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Ted Yu commented on HBASE-4308:
-------------------------------

Patch makes sense.
Minor comment:
{code}
+    boolean deleteOpenedNode = false;
{code}
I think openedNodeDeleted would be a better name.
                
> Race between RegionOpenedHandler and AssignmentManager
> ------------------------------------------------------
>
>                 Key: HBASE-4308
>                 URL: https://issues.apache.org/jira/browse/HBASE-4308
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.0
>            Reporter: Todd Lipcon
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 0.92.0
>
>         Attachments: HBASE-4308.patch
>
>
> When the master is processing a ZK event for REGION_OPENED, it calls delete() on the
znode before it removes the node from RegionsInTransition. If the notification of that delete
comes back into AssignmentManager before the region is removed from RIT, you see an error
like:
> 2011-08-30 17:43:29,537 WARN  [main-EventThread] master.AssignmentManager(861): Node
deleted but still in RIT: .META.,,1.1028785192 state=OPEN, ts=1314751409532, server=todd-w510,55655,1314751396840
> Not certain if it causes issues, but it's a concerning log message.

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