Grokbase Groups HBase dev May 2010
FAQ
NPE in HRegionServer when attempting to assignSplitDaughter
-----------------------------------------------------------

Key: HBASE-2585
URL: https://issues.apache.org/jira/browse/HBASE-2585
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.20.4
Environment: Linux dsmaster 2.6.32-21-server #32-Ubuntu SMP Fri Apr 16 09:17:34 UTC 2010 x86_64 GNU/Linux
HBase 0.20.4
Reporter: Jeff Whiting


While inserting a large number of rows into a HBase table (approx 100M) we got this error many times (usually do to multiple attempts) on one of our region servers:

2010-05-19 16:51:30,745 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: Attempt=1
java.io.IOException: java.io.IOException: java.lang.NullPointerException
at org.apache.hadoop.hbase.master.ServerManager.assignSplitDaughter(ServerManager.java:535)
at org.apache.hadoop.hbase.master.ServerManager.processSplitRegion(ServerManager.java:512)
at org.apache.hadoop.hbase.master.ServerManager.processMsgs(ServerManager.java:463)
at org.apache.hadoop.hbase.master.ServerManager.processRegionServerAllsWell(ServerManager.java:414)
at org.apache.hadoop.hbase.master.ServerManager.regionServerReport(ServerManager.java:323)
at org.apache.hadoop.hbase.master.HMaster.regionServerReport(HMaster.java:724)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:657)
at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:915)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:94)
at org.apache.hadoop.hbase.RemoteExceptionHandler.checkThrowable(RemoteExceptionHandler.java:48)
at org.apache.hadoop.hbase.RemoteExceptionHandler.checkIOException(RemoteExceptionHandler.java:66)
at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:577)
at java.lang.Thread.run(Thread.java:619)


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postedMay 20, '10 at 3:22p
activeMay 20, '10 at 3:22p
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