Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/2840#discussion_r19516551
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
---
@@ -274,21 +289,61 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, actorSystem: A
false
}
- // Add filters to the SparkUI
- def addWebUIFilter(filterName: String, filterParams: Map[String,
String], proxyBase: String) {
- if (proxyBase != null && proxyBase.nonEmpty) {
- System.setProperty("spark.ui.proxyBase", proxyBase)
- }
+ /**
+ * Return the number of executors currently registered with this backend.
+ */
+ def numExistingExecutors: Int = executorDataMap.size
+
+ /**
+ * Request an additional number of executors from the cluster manager.
+ * Return whether the request successfully reaches the cluster manager.
--- End diff --
Use of "cluster manager" also confusing here.
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