Does not contain a valid host:port authority: xx-_xx:9000

Questions

安装Hadoop时候，出现如下异常：

WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Problem connecting to server: xxx/xxx

或者出现

[1]Hadoop格式化HDFS报错java.net.UnknownHostException: centos64
[2]$ bin/hadoop namenode -format STARTUP_MSG: host = java.net.UnknownHostException:
[3]Does not contain a valid host:port authority: 62-rhel6.5-server:9000

Answer & Solution

防火墙是否开启；

/etc/hosts

内的配置是否正确，仔细检查。

(Hostname不能包含

－

或

_

。且不要重复绑定，即一个别名绑定多个地址，127.0.0.1 opp 192.168.100.1 opp 这样。)

是否进行Format操作。

Reference

[1]. Hadoop格式化HDFS报错java.net.UnknownHostException: centos64

[2] StackOverFlow:

[3] Does not contain a valid host:port authority: _9000