Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/17882#discussion_r120351695
--- Diff:
resource-managers/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
---
@@ -68,6 +68,8 @@ private[spark] abstract class YarnSchedulerBackend(
// Flag to specify whether this schedulerBackend should be reset.
private var shouldResetOnAmRegister = false
+ private var lastRequestExecutors = RequestExecutors(-1, -1, Map.empty,
Set.empty)
--- End diff --
I would suggest to change the first `-1` to
`Utils#getDynamicAllocationInitialExecutors`, and the second to be "0".
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