Github user jacek-lewandowski commented on the pull request:
https://github.com/apache/spark/pull/9287#issuecomment-154147358
@vanzin thanks a lot for your review. Of course, I'll apply all those
rename/import/style changes. But the thing about env variable needs explanation
- actually the user is supposed to provide a secret key in env variable.
Especially, it is much more secure than providing it in a command line of
spark-submit (as you know). Now that the network communication layers are
separated, the user would have to provide "credentials" in order to submit the
application.
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