Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/257#issuecomment-38827617
@NathanHowell. Just wondering - did you try this on the standalone mode?
Also, would you mind providing an example of the full end-to-end snippet of how
you are actually using the token file?
There is a patch here:
https://github.com/apache/incubator-spark/pull/467/files
that adds the ability to renew credentials in Spark. I think we can
probably merge it for Spark 1.0. My only concern was that the token itself is
not distributed securely by default. E.g. if someone knew the driver location
and port they could try to directly connect and download the delegation token.
With the changes in @tgravescs's patch though:
https://spark-project.atlassian.net/browse/SPARK-1189
Someone can set a cluster-wide secret to authenticate this dissemination.
Anyways, I'd like to get something in for 1.0 so any description you had would
be really helpful.
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