一台机器安装多套hadoop环境 端口冲突的解决

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通常测试环境多人共享，多个版本共享，经常出现多套环境共用到情况，下面是三个主要到端口冲突；


对于明显配置的端口，可以修改，有些没有配置的默认端口，往往找不上头绪：

dfs.datanode.http.address  通常会配置

dfs.datanode.address 默认50010
dfs.datanode.ipc.address 默认50020

2014-01-08 15:09:18,582 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Registered FSDatasetStatusMBean
2014-01-08 15:09:18,726 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.net.BindException: Problem binding to /0.0.0.0:50010 :
Address already in use
        at org.apache.hadoop.ipc.Server.bind(Server.java:192)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:309)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368)
Caused by: java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
        at org.apache.hadoop.ipc.Server.bind(Server.java:190)
        ... 6 more

2014-01-08 16:16:29,412 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.net.BindException: Problem binding to /0.0.0.0:50020 :
Address already in use
        at org.apache.hadoop.ipc.Server.bind(Server.java:192)
        at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:265)
        at org.apache.hadoop.ipc.Server.<init>(Server.java:1143)
        at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:489)
        at org.apache.hadoop.ipc.RPC.getServer(RPC.java:451)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:394)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368)
Caused by: java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
        at org.apache.hadoop.ipc.Server.bind(Server.java:190)
        ... 10 more

2014-01-08 16:02:29,008 INFO org.apache.hadoop.http.HttpServer: Port returned by webServer.getConnectors()[0].getLocalPort() before open()
is -1. Opening the listener on 21305
2014-01-08 16:02:29,036 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Waiting for threadgroup to exit, active threads is 0
2014-01-08 16:02:29,494 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
        at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
        at org.apache.hadoop.http.HttpServer.start(HttpServer.java:424)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:375)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368)

2014-01-08 16:02:29,745 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: