[HBASE-11947] NoSuchElementException in balancer for master regions

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.99.0
• Hadoop Flags: Reviewed
• Assignee: Sergey Soldatov
• Reporter: Enis Soztutar
• Created: 11/Sep/14 07:26
• Updated: 06/Apr/18 17:51
• Resolved: 11/Sep/14 17:25

Description

I've seen this in a local mode cluster running LTT:

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)

jxiang FYI.