xiaoa6435 commented on code in PR #42431:
URL: https://github.com/apache/spark/pull/42431#discussion_r1291065703
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mllib/src/main/scala/org/apache/spark/mllib/stat/correlation/SpearmanCorrelation.scala:
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@@ -65,8 +65,8 @@ private[stat] object SpearmanCorrelation extends Correlation
with Logging {
output
}
iter.flatMap { case (((j, v), uid), rank) =>
- // If we see a new value or cachedUids is too big, we flush ids with
their average rank.
- if (j != preCol || v != preVal || cachedUids.size >= 10000000) {
Review Comment:
flush of cachedUids.size >= N can't generate approximate results (far from
the correct results). It might seem better to generate a warning without flush
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