Github user suyanNone commented on a diff in the pull request:
https://github.com/apache/spark/pull/9992#discussion_r46235437
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala ---
@@ -228,6 +228,7 @@ private[spark] class ApplicationMaster(
}
private def sparkContextStopped(sc: SparkContext) = {
+ sc.requestTotalExecutors(0, 0, Map.empty)
--- End diff --
right... I am little mix with yarnScheduler and yarnSchedulerBackend
class...
the stop order was:
YarnClusterScheduler.stop
->TaskSchedulerImpl.stop -> CoarsedGrainSchedulerbackend.stop -> asyn:
stopExecutors
-> ApplicationMaster.sparkContextStopped(sc)
may be it is good way to override stop() in YarnSchedulerBackend.
```
YarnSchedulerBackend.stop {
doRequestTotalExecutors() //this is a askWithRetry...
super.stop
}
```
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