Github user srowen commented on the issue:
https://github.com/apache/spark/pull/14949
The problem is that it's called 'threshold' and not 'weight', and
'threshold' means something different. Is anyone suggesting that it was always
meant as a 'weight', and/or has a reference for this type of weighting? I've
never seen it ... not sure what multiplying a probability by 1/weight would
mean theoretically.
Note this change would also make threshold matter as a tie-breaker.
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