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https://issues.apache.org/jira/browse/HBASE-15933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu updated HBASE-15933:
---------------------------
Attachment: 15933.v1.txt
> NullPointerException may be thrown from SimpleRegionNormalizer#getRegionSize()
> ------------------------------------------------------------------------------
>
> Key: HBASE-15933
> URL: https://issues.apache.org/jira/browse/HBASE-15933
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 15933.v1.txt
>
>
> The following was observed in master log:
> {code}
> 2016-05-26 00:09:54,716 INFO [AM.ZK.Worker-pool2-t6917] master.RegionStates:
> Transition {7669ce6bec40dd44bb2388ff4d610b7b state=CLOSED, ts=1464221394716,
> server=x.net,60020,1463615066136} to {7669ce6bec40dd44bb2388ff4d610b7b
> state=OFFLINE, ts=1464221394716, server=x.net,60020,1463615066136}
> 2016-05-26 00:09:54,717 ERROR [y.net,60000,1463614725717_ChoreService_1]
> normalizer.RegionNormalizerChore: Caught error
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.normalizer.SimpleRegionNormalizer.getRegionSize(SimpleRegionNormalizer.java:174)
> at
> org.apache.hadoop.hbase.master.normalizer.SimpleRegionNormalizer.computePlanForTable(SimpleRegionNormalizer.java:99)
> at
> org.apache.hadoop.hbase.master.HMaster.normalizeRegions(HMaster.java:1406)
> at
> org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore.chore(RegionNormalizerChore.java:49)
> at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:185)
> 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
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> {code}
> DEBUG was not turned on.
> Looks like race condition where the Map returned by getRegionsLoad() no
> longer contained certain region.
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