Usually when I see this in pseudo-distributed, it means the datanode isn't up. Check logs?
On Mon, Mar 22, 2010 at 1:11 PM, Something Something < [email protected]> wrote: > After upgrading to hadoop-0.20.2, I started seeing these messages in the > log: > > > 2010-03-22 09:56:28,393 INFO org.apache.hadoop.ipc.Server: IPC Server > handler 1 on 9000, call addBlock(/home/training/hadoop/mapred/system/ > jobtracker.info, DFSClient_-1956918169) from 127.0.0.1:41067: error: > java.io.IOException: File /home/training/hadoop/mapred/system/ > jobtracker.info could only be replicated to 0 nodes, instead of 1 > java.io.IOException: File /home/training/hadoop/mapred/system/ > jobtracker.info could only be replicated to 0 nodes, instead of 1 > at > > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > > I am running in Psuedo-distributed mode. Before upgrading I used to see > these messages occasionally, but they were harmless. Now I see these when > I > try to copy files to DFS using -copyFromLocal, and the files no longer get > copied :( > > I mean, it's quite possible, this has nothing to do with the Hadoop upgrade > but something changed in my environment, but any help will be appreciated. > Thanks. >
