Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/16059#discussion_r90776114
--- Diff:
mllib/src/main/scala/org/apache/spark/ml/classification/OneVsRest.scala ---
@@ -175,6 +183,8 @@ final class OneVsRestModel private[ml] (
val updateUDF = udf { (predictions: Map[Int, Double], prediction:
Vector) =>
predictions + ((index, prediction(1)))
}
+ model.setFeaturesCol($(featuresCol))
+ model.setPredictionCol($(predictionCol))
--- End diff --
It's not necessary to ```setPredictionCol``` here, since the prediction
column of each base binary classifier is ignored during the transformation. The
```predictionCol``` of ```OneVsRestModel``` was set at L198.
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