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Spark evaluation NPEs #3970
Under some rare circumstances, Spark evaluation can lead to a NPE here:
I'm not totally sure on the cause here - I suspect this can occur with empty partitions, or fewer partitions than executors (10 objects on 16 workers causes NPE, but 10 objects on 8 workers doesn't). Either way, a defensive null check in that merge function should help.
added a commit
Dec 11, 2017
Hi! I'm experiencing the same issue in evaluation phase using DL4J 0.9.1 with Spark 2.1:
Is there any workaround I could try to make it work? I tried running it with different number of workers with no success.