Github user sitalkedia commented on a diff in the pull request:
https://github.com/apache/spark/pull/17297#discussion_r106315206
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala ---
@@ -193,13 +193,6 @@ private[spark] class TaskSchedulerImpl
private[scheduler](
val stageTaskSets =
taskSetsByStageIdAndAttempt.getOrElseUpdate(stage, new
HashMap[Int, TaskSetManager])
stageTaskSets(taskSet.stageAttemptId) = manager
- val conflictingTaskSet = stageTaskSets.exists { case (_, ts) =>
--- End diff --
Please note that this check is not needed anymore because the DagScheduler
already keeps track of running tasks and does not submit duplicate tasks
anymore.
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