Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/3073#discussion_r19920257
--- Diff: core/src/main/scala/org/apache/spark/TaskEndReason.scala ---
@@ -88,10 +88,32 @@ case class FetchFailed(
case class ExceptionFailure(
className: String,
description: String,
- stackTrace: Array[StackTraceElement],
+ stackTrace: Array[StackTraceElement], // backwards compatibility
--- End diff --
I think it's fine to add new fields to these case classes. It only breaks
compatibility for matching. It make sense to change these to not be case
classes in the future so that people don't try to match them (if we are going
to break most uses of matching in the future).
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