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https://issues.apache.org/jira/browse/HBASE-3039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-3039:
-------------------------
Status: Patch Available (was: Open)
> Stuck in regionsInTransition because rebalance came in at same time as a split
> ------------------------------------------------------------------------------
>
> Key: HBASE-3039
> URL: https://issues.apache.org/jira/browse/HBASE-3039
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: stack
> Fix For: 0.90.0
>
> Attachments: 3039.txt
>
>
> Saw this doing cluster tests:
> {code}
> 2010-09-25 21:31:48,212 DEBUG org.apache.hadoop.hbase.master.HMaster: Not
> running balancer because regions in transition:
> {73781e505e452221c9cd0e03585eb5d1=usertable,user800184056,
> 128...
> {code}
> Here's the problem:
> {code}
> 2010-09-25 08:16:48,186 INFO org.apache.hadoop.hbase.master.HMaster: balance
> hri=usertable,user800184056,1285397376525.73781e505e452221c9cd0e03585eb5d1.,
> src=su184,60020,
> 1285371621579, dest=sv2borg189,60020,1285371621577
> 2010-09-25 08:16:48,186 DEBUG
> org.apache.hadoop.hbase.master.AssignmentManager: Starting unassignment of
> region usertable,user800184056,1285397376525.
> 73781e505e452221c9cd0e03585eb5d1. (offlining)
> 2010-09-25 08:16:52,656 INFO org.apache.hadoop.hbase.master.ServerManager:
> Received REGION_SPLIT:
> usertable,user800184056,1285397376525.73781e505e452221c9cd0e03585eb5d1.:
>
> Daughters;
> usertable,user800184056,1285402609029.c05825561e7ea3cc6507c70bfb21541a.,
> usertable,user804024623,1285402609029.28f64903a7875bdafc1e7ee344b225b0.
> 2010-09-25 08:17:11,414 INFO
> org.apache.hadoop.hbase.master.AssignmentManager: Regions in transition timed
> out: usertable,user800184056,1285397376525.
> 73781e505e452221c9cd0e03585eb5d1. state=PENDING_CLOSE, ts=1285402608186
> {code}
> ....just as we were doing a balance, the region split.
> Over on RS, I see the split starting up and then in comes the balance 'close'
> message. By the time the close handler runs on regionserver the split is
> well underway and close handler actually doesn't find an online region to
> split.
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