Github user squito commented on a diff in the pull request:
https://github.com/apache/spark/pull/8559#discussion_r38491528
--- Diff: core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
---
@@ -1123,8 +1133,15 @@ class DAGScheduler(
// TODO: Cancel running tasks in the stage
logInfo(s"Resubmitting $mapStage (${mapStage.name}) and " +
s"$failedStage (${failedStage.name}) due to fetch failure")
+ // We might get lots of fetch failed for this stage, from lots
of executors.
+ // Its better if we can resubmit for all the failed executors
at one time, so lets
+ // just wait a *bit* before we resubmit.
--- End diff --
see https://github.com/apache/spark/pull/8560 to show that you can remove
the messageScheduler completely (the tests pass, anyway ...)
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