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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3761) AM info in job -list does not reflect the actual AM hostname
Date Thu, 01 Mar 2012 18:07:58 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13220197#comment-13220197

Robert Joseph Evans commented on MAPREDUCE-3761:

The issue is that the AM is arbitrary code.  It does not have to be something that we wrote.
 The only thing that we can do to restrict it is what the OS allows us to do.  If there is
a good way for us to make the OS not allow any incoming connections to the HTTP port of the
AM then I am all for that.  Sadly the HTTP port is an ephemeral port and so is the RPC port
that needs to be open to allow connections from other locations.   

I would prefer a different column that can show the host that the AM is running on.  It should
come from the RM indicating where it was scheduler, because it is the AM that reports back
both the web app URL and the RPC url.
> AM info in job -list does not reflect the actual AM hostname
> ------------------------------------------------------------
>                 Key: MAPREDUCE-3761
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3761
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>    Affects Versions: 0.23.1
>            Reporter: Ramya Sunil
>            Assignee: Vinod Kumar Vavilapalli
>             Fix For: 0.23.1
>         Attachments: MAPREDUCE-3761-20120202.txt, MAPREDUCE-3761-20120214.1.txt
> The AM info field on "bin/mapred job -list" currently has a value <resourcemanager
hostname>:8088/proxy/appID. This info is irrelevant unless it shows the real information
of where the AM was launched. This needs to be fixed to show the AM host details.

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