Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/12776#discussion_r61551752 --- Diff: core/src/main/scala/org/apache/spark/NewAccumulator.scala --- @@ -199,7 +199,8 @@ private[spark] object AccumulatorContext { * TODO: Don't use a global map; these should be tied to a SparkContext (SPARK-13051). */ @GuardedBy("AccumulatorContext") --- End diff -- I think this annotation is no longer needed. But first, what's the advantage of this change overall?
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