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 <[EMAIL PROTECTED]> > 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
