Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/19621
@MLnick Will RDD "count by value" aggregation be deterministic ? e.g., 2
RDD with the same elements, but with different element order and different
partition number, will `rdd.countByValue().toSeq` keep deterministic ? The
shuffling in `countByValue` seems also possible to break determinacy.
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