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https://issues.apache.org/jira/browse/HDFS-9427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208967#comment-15208967
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Xiaobing Zhou commented on HDFS-9427:
-------------------------------------
[~arpiagariu] here is the new mappings to keep 9870 as being easily remembered.
Thanks all for review.
{noformat}
Namenode ports
----------------
50470 --> 9871
50070 --> 9870
Secondary NN ports
---------------
50091 --> 9869
50090 --> 9868
Datanode ports
---------------
50020 --> 9867
50010 --> 9866
50475 --> 9865
50075 --> 9864
{noformat}
I also removed changes of backup NN ports.
> HDFS should not default to ephemeral ports
> ------------------------------------------
>
> Key: HDFS-9427
> URL: https://issues.apache.org/jira/browse/HDFS-9427
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, hdfs-client, namenode
> Affects Versions: 3.0.0
> Reporter: Arpit Agarwal
> Assignee: Xiaobing Zhou
> Priority: Critical
> Labels: Incompatible
> Attachments: HDFS-9427.000.patch, HDFS-9427.001.patch,
> HDFS-9427.002.patch, HDFS-9427.003.patch, HDFS-9427.004.patch
>
>
> 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.
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