Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/6430#discussion_r31683713
--- Diff:
core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala ---
@@ -261,14 +269,19 @@ private[spark] class ExecutorAllocationManager(
private def updateAndSyncNumExecutorsTarget(now: Long): Int =
synchronized {
val maxNeeded = maxNumExecutorsNeeded
- if (maxNeeded < numExecutorsTarget) {
+ if (initializing && (maxNeeded < numExecutorsTarget)) {
+ // when ExecutorAllocationManager is still in initializing status,
+ // and the max number of needed executors is less than the initial
number of executors,
+ // we just return without doing anything.
--- End diff --
I would rephrase this:
```
// Do not cancel requests while we are still initializing,
// otherwise the first job may have to ramp up unnecessarily
```
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