Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18492#discussion_r132628227
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/SparkListener.scala ---
@@ -291,6 +297,16 @@ private[spark] trait SparkListenerInterface {
def onBlockUpdated(blockUpdated: SparkListenerBlockUpdated): Unit
/**
+ * Called when a speculative task is submitted
+ */
+ def onSpeculativeTaskSubmitted(speculativeTask:
SparkListenerSpeculativeTaskSubmitted): Unit
+
+ /**
+ * Called when an extra executor is needed
+ */
+ def onExtraExecutorNeeded(): Unit
--- End diff --
do you know how executor allocation manager adjust the number of executors
currently? can we follow it instead of hacking the `SparkListener`?
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