Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/607#issuecomment-41875941
I agree we need to make sure it doesn't do that, but if its creating
filesystems specific for the ugi (supposed to be the leak) then closing them
after the task is finished (that ugi is done) then it shouldn't be a problem.
I'll look into it some more tomorrow to confirm.
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