Hadoop 错误日志：** could only be replicated to 0 nodes, instead of 1

Hadoop 程序调试出现 could only be replicated to 0 nodes, instead of 1 错误：

[haoop@hadoop hadoop-1.0.4]$ bin/hadoop dfs -put input/stations-fixed-width.txt  in 
14/03/04 02:02:54 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/haoop/in could only be replicated to 0 nodes, instead of 1
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

	at org.apache.hadoop.ipc.Client.call(Client.java:1070)
	at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
	at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
	at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3510)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3373)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2589)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2829)

14/03/04 02:02:54 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null
14/03/04 02:02:54 WARN hdfs.DFSClient: Could not get block locations. Source file "/user/haoop/in" - Aborting...
put: java.io.IOException: File /user/haoop/in could only be replicated to 0 nodes, instead of 1
14/03/04 02:02:54 ERROR hdfs.DFSClient: Exception closing file /user/haoop/in : org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/haoop/in could only be replicated to 0 nodes, instead of 1
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/haoop/in could only be replicated to 0 nodes, instead of 1
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1558)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:696)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:563)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1388)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1384)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1382)

	at org.apache.hadoop.ipc.Client.call(Client.java:1070)
	at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
	at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
	at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3510)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3373)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2589)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2829)

可能原因：namenode 格式化后,l临时文件目录还存在。
解决：删除临时文件目录，再格式化 namenode,重启的 hadoop 即可！