Github user jinxing64 commented on a diff in the pull request: https://github.com/apache/spark/pull/17533#discussion_r109877754 --- Diff: core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala --- @@ -138,7 +139,7 @@ private[spark] class TaskSetManager( private[scheduler] var pendingTasksWithNoPrefs = new ArrayBuffer[Int] // Set containing all pending tasks (also used as a stack, as above). - private val allPendingTasks = new ArrayBuffer[Int] + private var allPendingTasks = new ArrayBuffer[Int] --- End diff -- I make this `var`, because I don't have a better approach to sort ArrayBuffer in place. Advice?
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