Ted Yu created HBASE-15933:
------------------------------
Summary: 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
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
[shlpnesdh101.tvlport.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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