Github user lucio-yz commented on a diff in the pull request:
https://github.com/apache/spark/pull/20472#discussion_r165595281
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala ---
@@ -1002,10 +1008,14 @@ private[spark] object RandomForest extends Logging {
val numSplits = metadata.numSplits(featureIndex)
// get count for each distinct value
- val (valueCountMap, numSamples) =
featureSamples.foldLeft((Map.empty[Double, Int], 0)) {
+ var (valueCountMap, numSamples) =
featureSamples.foldLeft((Map.empty[Double, Int], 0)) {
--- End diff --
problem has been solved
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