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https://issues.apache.org/jira/browse/HDFS-9427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15163930#comment-15163930
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Xiaobing Zhou commented on HDFS-9427:
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Thanks [~iwasakims] for the pointer. The numbers started with 9000 suggested
by [~vinayrpet] are safe on various OS according to [~jmhsieh] [HBASE-10123
comment|https://issues.apache.org/jira/browse/HBASE-10123?focusedCommentId=13869893&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13869893].
> 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, namenode
> Affects Versions: 3.0.0
> Reporter: Arpit Agarwal
> Assignee: Xiaobing Zhou
> Priority: Critical
> Labels: Incompatible
>
> 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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