Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/4405#issuecomment-73754047
Hi @chesterxgchen,
> is spark standalone mode that does not support kerberos ?
Correct. Currently, there's no point in talking about kerberos for anything
but Yarn.
> I am thinking about the application that run spark job without forking a
process.
That is obviously not covered by this patch. For that application, it would
need to do the impersonation itself before creating a SparkContext (or doing
whatever it does to launch Spark).
Well, it could potentially call `SparkSubmit` programatically and pass this
argument, but I don't think that's a supported use case.
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