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https://issues.apache.org/jira/browse/HBASE-4308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096191#comment-13096191
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Jean-Daniel Cryans commented on HBASE-4308:
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I was also mentioning that we have to keep in mind that ZK notifications can be
delayed, sometimes by tens of seconds when there's a huge backup.
> 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
> Fix For: 0.92.0
>
>
> 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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