[jira] [Commented] (MAPREDUCE-320) Map/Reduce should use IP addresses to identify nodes rather than hostnames

["Allen Wittenauer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14065159#comment-14065159 ] 

Allen Wittenauer commented on MAPREDUCE-320:
--------------------------------------------

I'm tempted to close this as won't fix.  The fundamental problem is that the MR framework (and all other Hadoop systems) need to a way to distinguish a process as the same host on machines with multiple interfaces.  This is certainly fixable... and the various token systems we have floating around may actually do that.  But it's a tremendous amount of work (especially from a security perspective) and I don't see much interest in doing that work.

> Map/Reduce should use IP addresses to identify nodes rather than hostnames
> --------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-320
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-320
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>
> We should move the Map/Reduce framework to identify hosts as IP addresses rather than hostnames to prevent problems with DNS.



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