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From "Vinod Kumar Vavilapalli (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3314) Support AM specific blacklisting of nodes on the RM
Date Mon, 31 Oct 2011 06:00:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139942#comment-13139942
] 

Vinod Kumar Vavilapalli commented on MAPREDUCE-3314:
----------------------------------------------------

Thanks for filing this. I ran into the same issue but was lazy enough not to create it. Essentially
what happens for me is that on a small enough cluster (single node actually), if all nodes
are blacklisted by the AM, it will just keep getting containers and wasting them.
                
> Support AM specific blacklisting of nodes on the RM
> ---------------------------------------------------
>
>                 Key: MAPREDUCE-3314
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3314
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Hitesh Shah
>             Fix For: 0.23.1
>
>
> The AM blacklists certain nodes due to task failures but the RM does not know of this
and can allocate blacklisted nodes to the AM again and again. 
> RM should support a protocol that allows AM to inform the RM of nodes that it should
not allocate to it. 

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