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https://issues.apache.org/jira/browse/YARN-2422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14134896#comment-14134896
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Vinod Kumar Vavilapalli commented on YARN-2422:
-----------------------------------------------

It's not just weird, but it's broken on heterogeneous clusters. The right fix 
is a dup of YARN-56.

> yarn.scheduler.maximum-allocation-mb should not be hard-coded in 
> yarn-default.xml
> ---------------------------------------------------------------------------------
>
>                 Key: YARN-2422
>                 URL: https://issues.apache.org/jira/browse/YARN-2422
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.6.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Minor
>         Attachments: YARN-2422.1.patch
>
>
> Cluster with 40Gb NM refuses to run containers >8Gb.
> It was finally tracked down to yarn-default.xml hard-coding it to 8Gb.
> In case of lack of a better override, it should default to - 
> ${yarn.nodemanager.resource.memory-mb} instead of a hard-coded 8Gb.



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