polkosity, have you seen the job server that Ooyala open sourced?  I think it's very similar to what you're proposing with a REST API and re-using a SparkContext.

https://github.com/apache/incubator-spark/pull/222
http://engineering.ooyala.com/blog/open-sourcing-our-spark-job-server


On Mon, Mar 3, 2014 at 3:30 PM, polkosity <polkosity@gmail.com> wrote:
We're thinking of creating a Spark job server with a REST API, which would
enable us (as well as managing jobs) to re-use the spark context as you
suggest.  Thanks Koert!



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