Hello Johnson, I have observed similar error messages when my system ran out of disk space on an HDFS node, or in hadoop.tmp.dir.
Hope it helps. Best regards, Danny -----Original Message----- From: Johnson Chen [mailto:[email protected]] Sent: Thursday, July 02, 2009 3:47 AM To: [email protected] Subject: Block not found Hi , My hadoop program stop at 66% Reduce phrase 09/07/02 16:41:37 INFO mapred.JobClient: map 0% reduce 0% 09/07/02 16:41:48 INFO mapred.JobClient: map 50% reduce 0% 09/07/02 16:41:51 INFO mapred.JobClient: map 100% reduce 0% 09/07/02 16:41:58 INFO mapred.JobClient: map 100% reduce 66% And I found it pop up a lot of error message in namenode log . here is the error messages : 2009-07-02 16:43:44,461 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: commitBlockSynchronization(lastblock=blk_-7800669485846603924_144754, newgenerationstamp=0, newlength=0, newtargets=[], closeFile=false, deleteBlock=true) 2009-07-02 16:43:44,461 INFO org.apache.hadoop.ipc.Server: IPC Server handler 3 on 50040, call commitBlockSynchronization(blk_-7800669485846603924_144754, 0, 0, false, true, [Lorg.apache.hadoop.hdfs.protocol.DatanodeID;@2df2888) from 192.168.151.231:39976: error: java.io.IOException: Block (=blk_-7800669485846603924_144754) not found java.io.IOException: Block (=blk_-7800669485846603924_144754) not found at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.commitBlockSynchroni zation(FSNamesystem.java:1906) at org.apache.hadoop.hdfs.server.namenode.NameNode.commitBlockSynchronizati on(NameNode.java:410) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894) 2009-07-02 16:43:44,967 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: commitBlockSynchronization(lastblock=blk_-8293900342000823254_748370, newgenerationstamp=0, newlength=0, newtargets=[], closeFile=false, deleteBlock=true) 2009-07-02 16:43:44,967 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 50040, call commitBlockSynchronization(blk_-8293900342000823254_748370, 0, 0, false, true, [Lorg.apache.hadoop.hdfs.protocol.DatanodeID;@8ddfa31) from 192.168.151.232:45283: error: java.io.IOException: Block (=blk_-8293900342000823254_748370) not found java.io.IOException: Block (=blk_-8293900342000823254_748370) not found at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.commitBlockSynchroni zation(FSNamesystem.java:1906) at org.apache.hadoop.hdfs.server.namenode.NameNode.commitBlockSynchronizati on(NameNode.java:410) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894) Can anyone help me ? Thanks. -- Best wishes, Johnson Chen
