[HDFS-9427] HDFS should not default to ephemeral ports - ASF JIRA

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Hadoop Flags:

Incompatible change, Reviewed
Release Note:

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The patch updates the HDFS default HTTP/RPC ports to non-ephemeral ports. The changes are listed below:
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

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The patch updates the HDFS default HTTP/RPC ports to non-ephemeral ports. The changes are listed below: 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

HDFS defaults to ephemeral ports for the some HTTP/RPC endpoints. This can cause bind exceptions on service startup if the port is in use.

breaks

HDFS-10325 TestDFSShell#testMoveWithTargetPortEmpty fails

duplicates

HADOOP-7198 Hadoop defaults for web UI ports often fall smack in the middle of Linux ephemeral port range

is related to

HADOOP-12811 Change kms server port number which conflicts with HMaster port number

HDFS-12990 Change default NameNode RPC port back to 8020