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https://issues.apache.org/jira/browse/HBASE-7724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13568337#comment-13568337
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stack commented on HBASE-7724:
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[~ram_krish] let me review hbase-7521 (though going by Enis's testing, it looks
like the patch has issues)...Thanks for taking a look.
> [0.94] Just OPENED regions are ignored by ServerShutdownHandler and go
> unassigned for ever
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-7724
> URL: https://issues.apache.org/jira/browse/HBASE-7724
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Reporter: stack
>
> Visiting a user today, I came across following interesting case (0.94.2
> HBase).
> A server was added to cluster. It was assigned regions by the balancer. A
> bunch opened on the regionserver and just after the open, the regionserver
> was manually shutdown. There was a lag processing the zk region open events
> in the master (because clean shutdown, there was no zk activity when the
> regions were closed on the shutdown regionserver). Processing the server
> shutdown, we do this for a good few of the regions that had just been opened
> on the regionserver:
> 2013-01-30 02:41:19,917 INFO
> org.apache.hadoop.hbase.master.handler.ServerShutdownHandler: Skip assigning
> region
> OBFUSCATED_TABLE,OBFUSCATED_STARTROW,1344723216908.55e9cb551edeea0b52bb91af7c2de199.
> state=OPEN, ts=1359513674715, server=XX.XX.18.40,10304,1359513445136
> Seems like outright bug that'd we'd skip a region that is in transition that
> is in the OPEN state.
> More detail to follow.
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