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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4079) Allow MR AppMaster to limit ephemeral port range.
Date Mon, 23 Apr 2012 22:56:32 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260057#comment-13260057

Hadoop QA commented on MAPREDUCE-4079:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    -1 core tests.  The patch failed these unit tests:

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2299//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2299//console

This message is automatically generated.
> Allow MR AppMaster to limit ephemeral port range.
> -------------------------------------------------
>                 Key: MAPREDUCE-4079
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4079
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mr-am, mrv2
>    Affects Versions: 0.23.2, 2.0.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>            Priority: Blocker
>         Attachments: MR-4079-full-branch-0.23.txt, MR-4079-full-branch-0.23.txt, MR-4079-full-branch-0.23.txt,
MR-4079-full-branch-0.23.txt, MR-4079-trunk.txt, MR-4079-trunk.txt, MR-4079-trunk.txt, MR-4079-trunk.txt,
MR-4079-trunk.txt, MR-4079-trunk.txt
> Having the MapReduce Application Masters bind to any ephemeral port makes it very difficult
to setup ACLs.  mapreduce.job.am-access-disabled from MAPREDUCE-3251 is not a practical permanent
solution for all jobs.  Especially for tools like pig where they are not aware of mapreduce.job.am-access-disabled
and may deal with it properly.
> We should add in a config option that would allow someone to restrict the range of ports
that the MR-AM can bind to.  It will slow down startup in some cases because we will have
to probe for open ports instead of just asking the OS to find one for us.  But we can make
that conditional on this config so users who do not set this config do not see any performance

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