[jira] [Updated] (YARN-4779) Fix AM container allocation logic in SLS

["Wangda Tan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-4779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wangda Tan updated YARN-4779:
-----------------------------
    Attachment: YARN-4779.4.patch

Attached ver.4 patch.

> 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
>            Reporter: Wangda Tan
>            Assignee: Wangda Tan
>         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 AM.



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