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https://issues.apache.org/jira/browse/YARN-10425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17221619#comment-17221619
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Wangda Tan commented on YARN-10425:
-----------------------------------
Thanks [~shuzirra], this is a really big and important effort :).
I don't think I will have a chance to review the code, just one ask: let's make
sure the behavior is backward compatible, and let's keep the original test
cases in place (I remember we have a bunch of them).
> Replace the legacy placement engine in CS with the new one
> ----------------------------------------------------------
>
> Key: YARN-10425
> URL: https://issues.apache.org/jira/browse/YARN-10425
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Gergely Pollak
> Assignee: Gergely Pollak
> Priority: Major
> Attachments: YARN-10425.001.patch, YARN-10425.002.patch
>
>
> Remove the UserGroupMapping and ApplicationName mapping classes, and use the
> new CSMappingPlacementRule instead. Also cleanup the orphan classes which are
> used by these classes only.
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