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https://issues.apache.org/jira/browse/HBASE-11947?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Soldatov updated HBASE-11947:
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Attachment: HBASE_11947-v1.patch
Avoid the case when master is the last in the set.
> 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
> 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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