Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/8567#discussion_r38506300
--- Diff: mllib/src/main/scala/org/apache/spark/ml/param/params.scala ---
@@ -501,7 +501,13 @@ trait Params extends Identifiable with Serializable {
*/
final def getDefault[T](param: Param[T]): Option[T] = {
shouldOwn(param)
- defaultParamMap.get(param)
+ try {
+ defaultParamMap.get(param)
+ } catch {
+ case e: NoSuchElementException =>
--- End diff --
Can you check if the map `contains` the param rather than wait for an
exception? Really doesn't matter though. This looks OK except that you'll need
a space after "param" in the error message below, and you could use string
interpolation.
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