allisonwang-db commented on a change in pull request #33536:
URL: https://github.com/apache/spark/pull/33536#discussion_r694349947
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File path: core/src/main/scala/org/apache/spark/api/java/JavaUtils.scala
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@@ -89,7 +91,7 @@ private[spark] object JavaUtils {
mm.remove(k)
prev = None
case _ =>
- throw new UnsupportedOperationException("remove")
Review comment:
Usually, non-user-facing errors can be identified by the exception type,
for example, `IllegalStateException`, or by the code logic. Here it seems if
`underlying` is not a mutable map, then the `remove` operation is not
supported. This seems to be a develop-facing error.
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