java.io.IOException: File /dfs_operator.txt could only be replicated to 0 nodes,
2011-07-28 16:47:24,312 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 9100, call addBlock(/dfs_operator.txt, DFSClient_344588298, null, null) from 192.168.2.15:36470: error: java.io.IOExc