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Hadoop3.x相较于之前的版本来说,在端口的设置上发生了一些变化,先就这些端口变化总结如下:

Namenode ports: 50470 --> 9871, 50070 --> 9870, 8020 --> 9820
Secondary NN ports: 50091 --> 9869, 50090 --> 9868
Datanode ports: 50020 --> 9867, 50010 --> 9866, 50475 --> 9865, 50075 --> 9864