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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