Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/18492#discussion_r146190420
--- Diff:
core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala ---
@@ -373,8 +373,14 @@ private[spark] class ExecutorAllocationManager(
// If our target has not changed, do not send a message
// to the cluster manager and reset our exponential growth
if (delta == 0) {
- numExecutorsToAdd = 1
- return 0
+ // Check if there is any speculative jobs pending
+ if (listener.pendingTasks == 0 && listener.pendingSpeculativeTasks >
0) {
+ numExecutorsTarget =
+ math.max(math.min(maxNumExecutorsNeeded + 1, maxNumExecutors),
minNumExecutors)
--- End diff --
@janewangfb Would you please explain why here `+ 1` if there's pending
speculativeTasks, should the number of executors be calculated based on the
number of pending tasks? Thanks!
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