ava.net.BindException: Problem binding to [ubuntu-master:9000] java.net.BindException: 地址已在使用; For m

java.net.BindException: Problem binding to [ubuntu-master:9000] java.net.BindException: 地址已在使用; For more details see:  http://wiki.apache.org/hadoop/BindException
    at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:719)
    at org.apache.hadoop.ipc.Server.bind(Server.java:422)
    at org.apache.hadoop.ipc.Server$Listener.(Server.java:534)
    at org.apache.hadoop.ipc.Server.(Server.java:2203)
    at org.apache.hadoop.ipc.RPC$Server.(RPC.java:897)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.(ProtobufRpcEngine.java:505)
    at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:480)
    at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:742)
    at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.(NameNodeRpcServer.java:273)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createRpcServer(NameNode.java:510)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:493)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.(NameNode.java:684)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.(NameNode.java:669)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1254)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1320)
2014-07-22 09:49:25,471 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1

2014-07-22 09:49:25,475 INFO org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:

namenode节点出现如上错误，需要使用命令sudo netstat -antup查看相应的被占用的进程，然后kill掉，