Github user Ngone51 commented on a diff in the pull request:
https://github.com/apache/spark/pull/21131#discussion_r183619646
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala ---
@@ -689,6 +689,20 @@ private[spark] class TaskSchedulerImpl(
}
}
+ /**
+ * Marks the task has completed in all TaskSetManagers for the given
stage.
+ *
+ * After stage failure and retry, there may be multiple active
TaskSetManagers for the stage.
--- End diff --
IIRC, there's only one active `TaskSetManager` for a given stage, and with
some zombie `TaskSetManager`s possibly. Though, there may be some running tasks
in zombie `TaskSetManager`s.
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