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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4779) Fix AM container allocation logic in SLS
Date Fri, 24 Feb 2017 17:45:44 GMT

    [ https://issues.apache.org/jira/browse/YARN-4779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15883178#comment-15883178

Wangda Tan commented on YARN-4779:

Thanks [~sunilg] and [~jianhe] for review!

bq.  do we need to backport to branch-2 or branch-2.8 ?
I believe there're some dependencies haven't been backported to branch-2, so let's keep it
in trunk for now.

> Fix AM container allocation logic in SLS
> ----------------------------------------
>                 Key: YARN-4779
>                 URL: https://issues.apache.org/jira/browse/YARN-4779
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: scheduler-load-simulator
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>              Labels: oct16-medium
>             Fix For: 3.0.0-alpha3
>         Attachments: YARN-4779.1.patch, YARN-4779.2.patch, YARN-4779.3.patch, YARN-4779.4.patch,
> Currently, SLS uses unmanaged AM for simulated map-reduce applications. And first allocated
container for each app is considered to be the master container.
> This could be problematic when preemption happens. CapacityScheduler preempt AM container
at lowest priority, but the simulated AM container isn't recognized by scheduler -- it is
a normal container from scheduler's perspective.
> This JIRA tries to fix this logic: do the real AM allocation instead of using unmanaged

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