hadoop dns解析

因为 hadoop 集群之间通过主机名互相访问，所以必须设置 dns 解析。使用 gedit 编辑
dns 解析文件
在文本最后追加一行， “192.168.80.100 hadoop” ，注意 ip 与主机名之间使用空格分

2016-07-31 21:47:24,985 ERROR org.apache.hadoop.hdfs.server.namenode.NameNode: java.net.BindException: Problem binding to hadoop/192.168.80.100:9000 : Cannot assign requested address
    at org.apache.hadoop.ipc.Server.bind(Server.java:228)
    at org.apache.hadoop.ipc.Server$Listener.(Server.java:302)
    at org.apache.hadoop.ipc.Server.(Server.java:1488)
    at org.apache.hadoop.ipc.RPC$Server.(RPC.java:560)
    at org.apache.hadoop.ipc.RPC.getServer(RPC.java:521)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:302)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.(NameNode.java:536)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1410)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1419)
Caused by: java.net.BindException: Cannot assign requested address
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at org.apache.hadoop.ipc.Server.bind(Server.java:226)
    ... 8 more

最近在编写报表系统，闲时对linux的配置做了一些调整，配置了NAT访问外网的ip自动获取，然后配置了nginx，这几天再启动hadoop是保错上面的hadoop的日志，发现是主机的映射的问题
即本机现在ip为192.168.106.132
在hosts加入
192.168.106.132 hadoop即可