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https://issues.apache.org/jira/browse/MAPREDUCE-4869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13530467#comment-13530467
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Chris Nauroth commented on MAPREDUCE-4869:
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It might help to view this test side-by-side with the code in
{{MapReduceChildJVM#getVMCommand}}. That method is responsible for creating
the command to launch in the YARN container. The method uses
{{Environment.JAVA_HOME.$()}} and {{Environment.PWD.$()}}, which translate the
environment variables to $JAVA_HOME and $PWD or %JAVA_HOME% and %PWD% depending
on the platform.
Great catch on %CD% vs. %PWD%. We missed that in YARN-233, and it's probably a
problem. I think jobs are still working right now, because it's used in
java.io.tmpdir=%PWD%/tmp, and the %PWD% resolves to an empty string, so it just
uses /tmp. It works, but it isn't really correct. Do you mind if I spin off a
separate jira to address this? I think the scope of that change is going to be
much larger.
> TestMapReduceChildJVM fails in branch-trunk-win
> -----------------------------------------------
>
> Key: MAPREDUCE-4869
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4869
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Affects Versions: trunk-win
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: MAPREDUCE-4869-branch-trunk-win.1.patch
>
>
> The YARN-233 patch for getting YARN working on Windows forgot to include a
> corresponding change in {{TestMapReduceChildJVM}}, so the test is failing now.
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