Github user mgaido91 commented on a diff in the pull request:
https://github.com/apache/spark/pull/22764#discussion_r228173911
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeansModel.scala
---
@@ -225,13 +227,14 @@ object BisectingKMeansModel extends
Loader[BisectingKMeansModel] {
assert(formatVersion == thisFormatVersion)
val rootId = (metadata \ "rootId").extract[Int]
val distanceMeasure = (metadata \ "distanceMeasure").extract[String]
+ val trainingCost = (metadata \ "trainingCost").extract[Double]
--- End diff --
yes @WeichenXu123 , you're right, that line is a bug. Thanks for noticing
it. Anyway, that is going to be addressed in another PR and it is not
(strictly) related to this one. The other option, as I mentioned, is that if we
agree that this doesn't need to be restored after model persistence, we can
just ignore it in save/load.
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