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From "Jeff Whiting (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2585) NPE in HRegionServer when attempting to assignSplitDaughter
Date Thu, 20 May 2010 15:21:53 GMT
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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