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From "Arun C Murthy (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-3713) Incorrect headroom reported to jobs
Date Wed, 25 Jan 2012 00:30:44 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3713?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy updated MAPREDUCE-3713:
-------------------------------------

    Attachment: MAPREDUCE-3713.patch

Fixed headroom to take into a/c user consumption, not just app consumption.

Writing a unit test...
                
> Incorrect headroom reported to jobs
> -----------------------------------
>
>                 Key: MAPREDUCE-3713
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3713
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, resourcemanager
>    Affects Versions: 0.23.0
>            Reporter: Siddharth Seth
>            Assignee: Arun C Murthy
>            Priority: Blocker
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3713.patch
>
>
> With multiple jobs submitted per user, and multiple users submitting jobs - the headroom
reported to the AppMasters is incorrect (very high).
> Leads to a deadlock - reduces started, map tasks not complete... and reduces are not
preempted by the AM due to the incorrect headroom.

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