Github user vanzin commented on the issue:
https://github.com/apache/spark/pull/18587
I'm 99% sure there's nothing to do for YARN. This line takes care of it:
args.jars = mergeFileLists(args.jars, resolvedMavenCoordinates)
YARN cluster mode will distribute all jars in `args.jars` to the app.
As for the change, it seems to work because the Mesos backend starts the
driver using `spark-submit`, right? (It would probably have to change the
deploy mode from "cluster" to "client" when doing that but I didn't dig that
much into the code...)
If that's the case it seems fine, although it kinda loses the ability to
use the ivy cache on the machine launching the job...
Also, I'd be more comfortable if someone more familiar with the Mesos
backend could take a look. Not sure who that person is.
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