Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/2840#discussion_r19450141
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -856,6 +857,37 @@ class SparkContext(config: SparkConf) extends Logging {
listenerBus.addListener(listener)
}
+ /**
+ * :: DeveloperApi ::
+ * Request an additional number of executors from the cluster manager.
+ */
+ @DeveloperApi
+ def requestExecutors(numAdditionalExecutors: Int): Unit = {
+ schedulerBackend match {
+ case b: CoarseGrainedSchedulerBackend =>
b.requestExecutors(numAdditionalExecutors)
+ case _ => logWarning("Requesting executors is only supported in
coarse-grained mode")
+ }
+ }
+
+ /**
+ * :: DeveloperApi ::
+ * Request the cluster manager to kill the specified executors.
+ */
+ @DeveloperApi
+ def killExecutors(executorIds: Seq[String]): Unit = {
--- End diff --
Good point. I think only advanced users can use this. They can access this
through `sc.getExecutorStorageStatus` or attach their own listener and listen
for block manager events.
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