Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14858#discussion_r76572693
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala ---
@@ -116,8 +116,7 @@ final class QuantileDiscretizer @Since("1.6.0")
(@Since("1.6.0") override val ui
val distinctSplits = splits.distinct
if (splits.length != distinctSplits.length) {
- log.warn(s"Some quantiles were identical. Bucketing to
${distinctSplits.length - 1}" +
- s" buckets as a result.")
+ log.warn(s"Some quantiles were identical. Will return fewer buckets
than requested!")
--- End diff --
Yes, another reason to reject NaN splits.
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