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HDFS, mail # user - I just got "Cannot complete block: block has not been COMMITTED by the client"


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I just got "Cannot complete block: block has not been COMMITTED by the client"
stack 2009-11-11, 23:40
Any recommendations for what I should do to cope when I get such a beastie?
(It happened in our WAL so server kills itself).
Thanks,
St.Ack

java.io.IOException: java.io.IOException: Cannot complete block: block has
not been COMMITTED by the client
        at
org.apache.hadoop.hdfs.server.namenode.BlockInfoUnderConstruction.convertToCompleteBlock(BlockInfoUnderConstruction.java:158)
        at
org.apache.hadoop.hdfs.server.namenode.BlockManager.completeBlock(BlockManager.java:288)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.finalizeINodeFileUnderConstruction(FSNamesystem.java:1846)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFileInternal(FSNamesystem.java:1367)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.completeFile(FSNamesystem.java:1329)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.complete(NameNode.java:660)
        at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:516)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:964)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:960)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:958)

        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.LogRoller.run(LogRoller.java:98)