Github user andrewor14 commented on a diff in the pull request: https://github.com/apache/spark/pull/2338#discussion_r17451124 --- Diff: core/src/main/scala/org/apache/spark/executor/Executor.scala --- @@ -360,7 +360,13 @@ private[spark] class Executor( if (!taskRunner.attemptedTask.isEmpty) { Option(taskRunner.task).flatMap(_.metrics).foreach { metrics => metrics.updateShuffleReadMetrics - tasksMetrics += ((taskRunner.taskId, metrics)) + if (isLocal) { + // make a deep copy of it --- End diff -- Could you elaborate on why we need to do this in the comment?
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