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From "Tsz Wo \(Nicholas\), Sze" <s29752-hadoopu...@yahoo.com>
Subject Re: Block not found during commitBlockSynchronization
Date Sat, 06 Dec 2008 02:31:58 GMT
Which version are you using?

Calling commitBlockSynchronization(...) with newgenerationstamp=0, newlength=0, newtargets=[]
does not look normal.  You may check the namenode log and the client log about the block blk_-4236881263392665762.

Nicholas Sze




----- Original Message ----
> From: Brian Bockelman <bbockelm@math.unl.edu>
> To: core-user@hadoop.apache.org
> Sent: Friday, December 5, 2008 5:22:03 PM
> Subject: Block not found during commitBlockSynchronization
> 
> Hey,
> 
> I'm seeing this message repeated over and over in my logs:
> 
> 2008-12-05 19:20:00,534 INFO 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: 
> commitBlockSynchronization(lastblock=blk_-4236881263392665762_88597, 
> newgenerationstamp=0, newlength=0, newtargets=[])
> 2008-12-05 19:20:00,534 INFO org.apache.hadoop.ipc.Server: IPC Server handler 29 
> on 9000, call commitBlockSynchronization(blk_-4236881263392665762_88597, 0, 0, 
> false, true, [Lorg.apache.hadoop.hdfs.protocol.DatanodeID;@67537412) from 
> 172.16.1.184:57586: error: java.io.IOException: Block 
> (=blk_-4236881263392665762_88597) not found
> java.io.IOException: Block (=blk_-4236881263392665762_88597) not found
>     at 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.commitBlockSynchronization(FSNamesystem.java:1898)
>     at 
> org.apache.hadoop.hdfs.server.namenode.NameNode.commitBlockSynchronization(NameNode.java:410)
>     at sun.reflect.GeneratedMethodAccessor21.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$Server.call(RPC.java:452)
>     at org.apache.hadoop.ipc.Server$Handler.run(Server.java:892)
> 
> What can I do to debug?
> 
> Brian


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