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https://issues.apache.org/jira/browse/YARN-6595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16241345#comment-16241345
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Arun Suresh commented on YARN-6595:
-----------------------------------

Thanks for the review [~kkaranasos]

bq. Let's remove the test from the BasePBImplRecordsTest. I think we can add a 
simple test at the TestAMRMClient.
Unfortunately, we need this - Since it is an inner component / sub field of 
SchedulingRequest and AllocateRequest, the TestPBImplRecords will fail for all 
these classes if we don't include the if-clause in the BasePBImplRecordsTest 
(the reason being, PlacementConstraint is the only structure that deviates from 
having a correspondingly named PBImpl class). I agree we can move the actual 
testing of the PlacemetConstraint to another class - but we need this here 
atleast for the interim.

I agree with the rest of your comments and shall address them shortly.

> [API] Add Placement Constraints at the application level
> --------------------------------------------------------
>
>                 Key: YARN-6595
>                 URL: https://issues.apache.org/jira/browse/YARN-6595
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Konstantinos Karanasos
>            Assignee: Arun Suresh
>         Attachments: YARN-6595-YARN-6592.001.patch, 
> YARN-6595-YARN-6592.002.patch, YARN-6595-YARN-6592.003.patch, 
> YARN-6595-YARN-6592.004.patch
>
>
> This JIRA allows placement constraints to be specified at the application 
> level.
> This will be used for placement constraints between different components of 
> the application.



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