Craig Welch commented on YARN-2803:

Right, we currently don't run (can't..) any unit tests through the secure 
windows codepath (which is problematic...) so disabling the tests in that case 
is accomplished :-) I'm going to put up a patch in a few which will retain the 
existing logic for windows secure even though we know it is not quite correct - 
the patch as it is now will completely break windows secure mode, so I think 
it's better for now to allow that path to function as it did before and only 
change the non-secure path so that we fix this issue - I think we'll want to go 
with that patch for now, and to open a follow-on to address the windows-secure 
case in a better way.

> MR distributed cache not working correctly on Windows after NodeManager 
> privileged account changes.
> ---------------------------------------------------------------------------------------------------
>                 Key: YARN-2803
>                 URL: https://issues.apache.org/jira/browse/YARN-2803
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>            Reporter: Chris Nauroth
>            Assignee: Craig Welch
>            Priority: Critical
>         Attachments: YARN-2803.0.patch
> This problem is visible by running {{TestMRJobs#testDistributedCache}} or 
> {{TestUberAM#testDistributedCache}} on Windows.  Both tests fail.  Running 
> git bisect, I traced it to the YARN-2198 patch to remove the need to run 
> NodeManager as a privileged account.  The tests started failing when that 
> patch was committed.

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