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From "Patrick Wendell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3451) Port Fair Scheduler to MR2
Date Wed, 09 May 2012 01:11:50 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270993#comment-13270993
] 

Patrick Wendell commented on MAPREDUCE-3451:
--------------------------------------------

Just added a patch addressing the legitimate findbugs and javadoc warnings. There were some
findbugs warnings about concurrency that seemed like false positives - not sure if there is
a way to suppress them.

I can't re-create the core test failures locally... they seem related to port contention issues
and Kerberos issues around the hostname of the Hudson machine. I don't see any direct relationship
between these test failures and the code in this patch. Could we at least re-run this in Hudson
to make sure that these tests are deterministically failing?
                
> Port Fair Scheduler to MR2
> --------------------------
>
>                 Key: MAPREDUCE-3451
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3451
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: mrv2, scheduler
>            Reporter: Patrick Wendell
>            Assignee: Patrick Wendell
>         Attachments: MAPREDUCE-3451.v1.patch.txt, MAPREDUCE-3451.v2.patch.txt, MAPREDUCE-3451.v3.patch.txt,
MAPREDUCE-3451.v4.patch.txt
>
>
> The Fair Scheduler is in widespread use today in MR1 clusters, but not yet ported to
MR2. This is to track the porting of the Fair Scheduler to MR2 and will be updated to include
design considerations and progress.

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