[HBASE-10726] Fix java.lang.ArrayIndexOutOfBoundsException in StochasticLoadBalancer$LocalityBasedCandidateGenerator

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.96.2, 0.98.1, 0.99.0, hbase-10070
• Assignee: Enis Soztutar
• Reporter: Enis Soztutar
• Created: 12/Mar/14 04:59
• Updated: 21/Feb/15 23:30
• Resolved: 12/Mar/14 18:36

Description

Recent fix in HBASE-10632 to StochasticLoadBalancer$LocalityBasedCandidateGenerator revealed another issue:

java.lang.ArrayIndexOutOfBoundsException: -1
	at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$CandidateGenerator.pickRandomRegion(StochasticLoadBalancer.java:405)
	at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$LocalityBasedCandidateGenerator.generate(StochasticLoadBalancer.java:571)
	at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:235)
	at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1465)
	at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1505)

Issue Links

• relates to: HBASE-10632 Region lost in limbo after ArrayIndexOutOfBoundsException during assignment