Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/15009
> Did you have ideas on this?
Nothing fully baked. The closest I got was to have a special interface that
apps could implement where a `SparkConf` would be passed as an argument,
instead of having just a random `main(String[])` method as the entry point.
Then `SparkSubmit` could avoid the system properties route if that interface is
detected.
Then e.g. YARN's `Client.scala` could implement it, and you could safely
submit multiple yarn-cluster mode apps from the same JVM.
Anything else I thought of was pretty hacky and a didn't end up giving much
extra thought.
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