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Jimmy Xiang commented on HBASE-11947: ------------------------------------- Do we have to use a while loop? Can we just iterator from the beginning again if master server is the last entry? > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)