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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11947) NoSuchElementException in balancer for master regions
Date Thu, 11 Sep 2014 16:02:47 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130202#comment-14130202
] 

stack commented on HBASE-11947:
-------------------------------

Patch looks good to me [~jxiang]  Wouldn't work if master is supposed to be a regionserver
like any other regionserver... but that case doesn't seem to be handled here anyways.  What
you think [~jxiang]?

> NoSuchElementException in balancer for master regions
> -----------------------------------------------------
>
>                 Key: HBASE-11947
>                 URL: https://issues.apache.org/jira/browse/HBASE-11947
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Enis Soztutar
>            Assignee: Sergey Soldatov
>             Fix For: 2.0.0, 0.99.1
>
>         Attachments: HBASE_11947-v1.patch
>
>
> I've seen this in a local mode cluster running LTT:
> {code}
> 2014-09-11 00:04:11,293 ERROR [localhost,63272,1410418744870-BalancerChore] balancer.BalancerChore:
Caught exception
> java.util.NoSuchElementException
> 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:925)
> 	at java.util.HashMap$KeyIterator.next(HashMap.java:956)
> 	at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.balanceMasterRegions(BaseLoadBalancer.java:968)
> 	at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:210)
> 	at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:982)
> 	at org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:50)
> 	at org.apache.hadoop.hbase.Chore.run(Chore.java:80)
> 	at java.lang.Thread.run(Thread.java:745)
> {code}
> [~jxiang] FYI. 



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