Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/17925#discussion_r115928546
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -1054,15 +1053,17 @@ class DAGScheduler(
return
}
+ // Mark the stage as submitted and send an event on the bus. If there
are pending tasks, submit
+ // them, otherwise immediately mark the stage as finished, and submit
any child stages.
+ stage.latestInfo.submissionTime = Some(clock.getTimeMillis())
--- End diff --
Interesting, had not noticed the change in behavior.
Since behavior of `SparkListenerStageSubmitted` is unfortunately not
documented, I agree that perhaps we should not change the semantics here (I am
curious if it actually impacts in reality, but good to err on side of caution).
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