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https://issues.apache.org/jira/browse/YARN-5106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16991698#comment-16991698
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Wilfred Spiegelenburg commented on YARN-5106:
---------------------------------------------

It is correct that XMLs would have been moved around as testing has changed 
with the addition of YARN-8967.
Back porting could thus require major updates to the patch to make sure you 
pick up the earlier set of XMLs. It really depends on how important this is to 
get back ported.

Not having it in the three active branches 3.x could make back porting new FS 
tests much harder. The choice becomes: do the work once now or keep doing it 
for a longer period for each fix/change separately.

> Provide a builder interface for FairScheduler allocations for use in tests
> --------------------------------------------------------------------------
>
>                 Key: YARN-5106
>                 URL: https://issues.apache.org/jira/browse/YARN-5106
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler
>    Affects Versions: 2.8.0
>            Reporter: Karthik Kambatla
>            Assignee: Adam Antal
>            Priority: Major
>              Labels: newbie++
>             Fix For: 3.3.0
>
>         Attachments: YARN-5106-branch-3.1.001.patch, 
> YARN-5106-branch-3.1.001.patch, YARN-5106-branch-3.1.001.patch, 
> YARN-5106-branch-3.1.002.patch, YARN-5106-branch-3.2.001.patch, 
> YARN-5106-branch-3.2.001.patch, YARN-5106-branch-3.2.002.patch, 
> YARN-5106.001.patch, YARN-5106.002.patch, YARN-5106.003.patch, 
> YARN-5106.004.patch, YARN-5106.005.patch, YARN-5106.006.patch, 
> YARN-5106.007.patch, YARN-5106.008.patch, YARN-5106.008.patch, 
> YARN-5106.008.patch, YARN-5106.009.patch, YARN-5106.010.patch, 
> YARN-5106.011.patch, YARN-5106.012.patch, YARN-5106.013.patch, 
> YARN-5106.014.patch, YARN-5106.015.patch, YARN-5106.016.patch
>
>
> Most, if not all, fair scheduler tests create an allocations XML file. Having 
> a helper class that potentially uses a builder would make the tests cleaner. 



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