Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/8567#discussion_r38589547
--- 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 --
We don't have performance issues here. So code readability is more
important, e.g.,
~~~scala
defaultParamMap.getOrElse(param,
throw new NoSuchElementException(s"No default value for ${param.name} in
${this.getClass}.")
~~~
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