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From "Vinod Kumar Vavilapalli (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3761) AM info in job -list does not reflect the actual AM hostname
Date Wed, 29 Feb 2012 04:30:23 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13218896#comment-13218896
] 

Vinod Kumar Vavilapalli commented on MAPREDUCE-3761:
----------------------------------------------------

What we really want to show is the AM hostname, either through the scheduling-Info field or
another.

bq. If an end user sees this output they are going to copy and past this into the browser
and go to that link. If the AM is well behaved it will redirect the user back through the
proxy, but if the AM is malicious, it will do exactly what the proxy is intended to help mitigate.
This clearly seems like an issue with proxy or the AMs. We cannot rely on the fact that users
will behave properly and will always click through the proxy for the sake of security. I agree
that exposing this directly reduces security that exists today but this is as good as anyone
doing an RPC call to figure out where an AM is running.

The real issue (if there is one) is that AMs accept requests that do not originate from the
proxy. We should fix that if at all, instead of trying to avoid users from not seeing information
like this. What do you think?

                
> 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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