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https://issues.apache.org/jira/browse/YARN-9017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17286527#comment-17286527
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Brahma Reddy Battula commented on YARN-9017:
--------------------------------------------
Cherry-picked to branch-3.3 .. thanks all.
> 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, 3.3.1
>
> 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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