Github user zhzhan commented on the pull request:
https://github.com/apache/spark/pull/3409#issuecomment-65137532
@vanzin This specific patch is to pass extra java options to AM. The main
reason is that AM parses mapred-site.xml and need the system property to
correctly do it. Please take a look at the pull description on why this is
needed. @tgravescs I agree with @vanzin, and don't see the scenario where AM
need extraClassPah and extraLibraryPath. Can you please leverage it a little
more?
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