[jira] [Commented] (YARN-9017) PlacementRule order is not maintained in CS

["Bilwa S T (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-9017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17286510#comment-17286510 ] 

Bilwa S T commented on YARN-9017:
---------------------------------

[~brahmareddy] please cherry-pick this to branch 3.3.1.  Thanks

> PlacementRule order is not maintained in CS
> -------------------------------------------
>
>                 Key: YARN-9017
>                 URL: https://issues.apache.org/jira/browse/YARN-9017
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.4.0
>            Reporter: Bibin Chundatt
>            Assignee: Bilwa S T
>            Priority: Major
>             Fix For: 3.4.0
>
>         Attachments: YARN-9017.001.patch, YARN-9017.002.patch, YARN-9017.003.patch
>
>
> {{yarn.scheduler.queue-placement-rules}} doesn't work as expected in Capacity Scheduler
> {quote}
> * **Queue Mapping Interface based on Default or User Defined Placement Rules** - This feature allows users to map a job to a specific queue based on some default placement rule. For instance based on user & group, or application name. User can also define their own placement rule.
> {quote}
> As per current UserGroupMapping is always added in placementRule. {{CapacityScheduler#updatePlacementRules}}
> {code}
>     // Initialize placement rules
>     Collection<String> placementRuleStrs = conf.getStringCollection(
>         YarnConfiguration.QUEUE_PLACEMENT_RULES);
>     List<PlacementRule> placementRules = new ArrayList<>();
> ...
>     // add UserGroupMappingPlacementRule if absent
>     distingushRuleSet.add(YarnConfiguration.USER_GROUP_PLACEMENT_RULE);
> {code}
> PlacementRule configuration order is not maintained 



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