Github user MLnick commented on a diff in the pull request: https://github.com/apache/spark/pull/18281#discussion_r128708769 --- Diff: mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala --- @@ -271,7 +273,7 @@ object OneVsRestModel extends MLReadable[OneVsRestModel] { @Since("1.4.0") final class OneVsRest @Since("1.4.0") ( @Since("1.4.0") override val uid: String) - extends Estimator[OneVsRestModel] with OneVsRestParams with MLWritable { + extends Estimator[OneVsRestModel] with OneVsRestParams with HasParallelism with MLWritable { --- End diff -- It will be used by cross validator and train validation split, that's why it's shared.
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