Github user jimjh commented on the pull request:
https://github.com/apache/spark/pull/3238#issuecomment-63230766
I am still inclined to go with (2), with a variant of what @vanzin is
suggesting. (Yes, I am hoping to get this out for 1.2.0. Do we have a date?)
We could have a `spark.yarn.datanucleus.dir` config option. If this is not
set, the launcher would look for datanucleus jars in `SPARK_HOME`; otherwise,
it would look for datanucleus jars in `spark.yarn.datanucleus.dir`. This
mirrors what is currently being done for `__spark__.jar` (see
[here](https://github.com/apache/spark/blob/master/yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala#L573)
and
[here](https://github.com/apache/spark/blob/master/yarn/common/src/main/scala/org/apache/spark/deploy/yarn/ClientBase.scala#L172).)
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