我正在尝试使用 ssh 从客户端 PC 到 NameNode 服务器将文件放入 hdfs。有 2 台机器:一台 NameNode 和一台 DataNode。这是我正在尝试的命令;
$ bin/hadoop fs -fs hdfs://MY_IP:MY_PORT -put example.txt example.txt
但它会引发异常。日志说;
2013-05-23 09:25:31,808 ERROR org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:_my_user_name_ cause:java.io.IOException: Unknown protocol to DataNode: org.apache.hadoop.hdfs.protocol.ClientProtocol
2013-05-23 09:25:31,808 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on _my_port_, call getProtocolVersion(org.apache.hadoop.hdfs.protocol.ClientProtocol, 61) from _ip_:_port_: error: java.io.IOException: Unknown protocol to DataNode: org.apache.hadoop.hdfs.protocol.ClientProtocol
java.io.IOException: Unknown protocol to DataNode: org.apache.hadoop.hdfs.protocol.ClientProtocol
at org.apache.hadoop.hdfs.server.datanode.DataNode.getProtocolVersion(DataNode.java:1759)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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)
可能是什么问题?非常感谢