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Date: Tue, 24 Jan 2012 21:28:43 +0000 (UTC)
From: "Arun C Murthy (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (MAPREDUCE-3683) Capacity scheduler LeafQueues
 maximum capacity calculation issues
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-3683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated MAPREDUCE-3683:
-------------------------------------

    Status: Patch Available  (was: Open)
    
> Capacity scheduler LeafQueues maximum capacity calculation issues
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-3683
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3683
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Thomas Graves
>            Assignee: Arun C Murthy
>            Priority: Blocker
>         Attachments: MAPREDUCE-3683.patch, MAPREDUCE-3683.patch, MAPREDUCE-3683.patch
>
>
> In the Capacity scheduler if you configure the queues to be hierarchical where you have root -> parent queue -> leaf queue, the leaf queue doesn't take into account its parents maximum capacity when calculate its own maximum capacity, instead it seems to use the parents capacity.  Looking at the code its using the parents absoluteCapacity and I think it should be using the parents absoluteMaximumCapacity.
> It also seems to only use the parents capacity in the leaf queues max capacity calculation when the leaf queue has a max capacity configured. If the leaf queues maximum-capacity is not configured, then it can use 100% of the cluster.  

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