最近配置Hadoop3.x集群的时候发现了一些端口变动，导致web访问UI界面失败，查阅资料写个帖子记录分析一下。

Namenode 端口:
2.x端口 3.x端口 name desc
50470 9871 dfs.namenode.https-address The namenode secure http server address and port.
50070 9870 dfs.namenode.http-address The address and the base port where the dfs namenode web ui will listen on.
8020 9820 fs.defaultFS 指定HDFS运行时nameNode地址
Secondary NN 端口:
2.x端口 3.x端口 name desc
50091 9869 dfs.namenode.secondary.https-address The secondary namenode HTTPS server address and port
50090 9868 dfs.namenode.secondary.http-address The secondary namenode HTTPS server address and port
Datanode 端口:
2.x端口 3.x端口 name desc
50020 9867 dfs.datanode.ipc.address The datanode ipc server address and port.
50010 9866 dfs.datanode.address The datanode server address and port for data transfer.
50475 9865 dfs.datanode.https.address The datanode secure http server address and port
50075 9864 dfs.datanode.http.address The datanode http server address and por
Yarn 端口
2.x端口 3.x端口 name desc
8088 yarn.resourcemanager.webapp.address http服务端口
以上是常用到的一些配置中的端口变动
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原文链接：https://blog.csdn.net/qq_31454379/article/details/105439752