Github user Yunni commented on the issue: https://github.com/apache/spark/pull/15800 @sethah Not exactly. Based on the logic in `approxNearestNeighbor`, if there aren't enough candidates where the distance is zero, we'll scan the the whole dataset. I don't think multi-probing works well on MinHash. Multi-probing mostly benefits LSH family like hyperplane projection and bits sampling.
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