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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9427) HDFS should not default to ephemeral ports
Date Wed, 24 Feb 2016 23:28:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15166323#comment-15166323
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Jonathan Hsieh commented on HDFS-9427:
--------------------------------------

Here's another to consider: the hadoop-kms port.  It was brought up on HBASE-10123 that it
uses 16000 as default (and clashes with hbase currently)

this line indicates that 16000 is the default -- likely a search for that ENV variable will
find where it is set by default in the code or confs.
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-kms/src/main/conf/kms-env.sh#L25

> 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 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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