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https://issues.apache.org/jira/browse/HBASE-26712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani resolved HBASE-26712.
----------------------------------
Fix Version/s: 2.6.0
(was: 2.4.10)
Hadoop Flags: Reviewed
Resolution: Fixed
Thanks for the contribution [~comnetwork].
> Balancer encounters NPE in rare case
> ------------------------------------
>
> Key: HBASE-26712
> URL: https://issues.apache.org/jira/browse/HBASE-26712
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.4.9
> Reporter: Viraj Jasani
> Assignee: chenglei
> Priority: Major
> Fix For: 2.5.0, 2.6.0, 3.0.0-alpha-3
>
>
>
> {code:java}
> ERROR [ster-1:60000.Chore.1] hbase.ScheduledChore - Caught error
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.assignment.AssignmentManager.balance(AssignmentManager.java:758)
> at
> org.apache.hadoop.hbase.master.HMaster.executeRegionPlansWithThrottling(HMaster.java:1834)
> at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1797)
> at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1707)
> at
> org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:49)
> at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:153)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at
> org.apache.hadoop.hbase.JitterScheduledThreadPoolExecutorImpl$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:111)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> Let's fix this.
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