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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3039) Stuck in regionsInTransition because rebalance came in at same time as a split
Date Mon, 27 Sep 2010 21:03:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-3039:
-------------------------

        Status: Resolved  (was: Patch Available)
    Resolution: Fixed

Committed after testing up on cluster.

> 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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