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https://issues.apache.org/jira/browse/MAPREDUCE-2792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13115295#comment-13115295
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Vinod Kumar Vavilapalli commented on MAPREDUCE-2792:
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The last I remember, while implementing security for YARN components, I added
IP addresses instead of hostnames because I ran into issues with using
hostnames at the RPC security layer - probably related to HADOOP-7510.
It will be ideal to replace IP addresses with hostnames everywhere. But if it
turns out that we need RPC changes, in the minimum we need to change the
displayed IPs to hostnames on web UI and command-line.
> [MR-279] Replace IP addresses with hostnames
> --------------------------------------------
>
> Key: MAPREDUCE-2792
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2792
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2, security
> Affects Versions: 0.23.0
> Reporter: Ramya Sunil
> Assignee: Vinod Kumar Vavilapalli
> Priority: Critical
> Fix For: 0.23.0
>
>
> Currently, all the logs, UI, CLI have IP addresses of the NM/RM, which are
> difficult to manage. It will be useful to have hostnames like in 0.20.x for
> easier debugging and maintenance purpose.
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