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From "Siddharth Seth (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4073) CS assigns multiple off-switch containers when using multi-level-queues
Date Thu, 29 Mar 2012 16:54:26 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241384#comment-13241384
] 

Siddharth Seth commented on MAPREDUCE-4073:
-------------------------------------------

Arun, the initial patch wasn't dropping the assignment. It was just setting the type - based
on the first allocation. I didn't want to add setters to CSAssignement, since it's a read-only
interface rightnow.
ParentQueue.assignContainer seems to attempt multiple assignments only at the root level -
in which case the return type could be incorrect, but then it's never used outside of ParentQueue
(root) itself.
                
> CS assigns multiple off-switch containers when using multi-level-queues
> -----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4073
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4073
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, scheduler
>    Affects Versions: 0.23.1
>            Reporter: Siddharth Seth
>            Assignee: Siddharth Seth
>            Priority: Critical
>         Attachments: MAPREDUCE-4073.patch, MR4073.txt
>
>
> CS is supposed to be allocating a single off-switch container per node heartbeat (MAPREDUCE-3641).
This works for queues directly under root, but not in the case of multi-level queues.

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