Github user echarles commented on the issue:
https://github.com/apache/zeppelin/pull/2637
Feedback/Question on latest commit:
+ For `cluster` mode, I sometimes receive a null pointer at first run,
running a second time directly after is fine.
+ Are you enforcing the executor pod name?
+ Additional dep for cluster mode works with `%spark.dep`, but not via the
Spark interpreter setting UI (see screnshot)

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