博客

将配置修改回来

hadoop.security.authentication: Kerberos -> Simple 
hadoop.security.authorization: true -> false 
dfs.datanode.address: -> from 1004 (for Kerberos) to 50010 (default) 
dfs.datanode.http.address: -> from 1006 (for Kerberos) to 50075 (default)

如果端口没有改回来，报错

2019-06-04 11:01:31,082 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
java.io.IOException: Failed on local exception: java.net.SocketException: 权限不够; Host Details : local host is: "fuzhou202"; destination host is: (unknown):0;
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:772)
        at org.apache.hadoop.ipc.Server.bind(Server.java:524)
        at org.apache.hadoop.ipc.Server.bind(Server.java:496)
        at org.apache.hadoop.hdfs.net.TcpPeerServer.<init>(TcpPeerServer.java:115)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initDataXceiver(DataNode.java:1059)
        at org