问题：错误: 代理抛出异常错误: java.net.MalformedURLException: Local host name unknown: java.net.UnknownHostException: Master.Hadoop: Master.Hadoop 解决：
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vim /etc/sysconfig/network
HOSTNAME=Master.Hadoop
vim /etc/hosts
127.0.0.1 localhost.localdomain localhost Master.Hadoo
::1 localhost6.localdomain6 localhost6
你可以参考一下