Github user ksakellis commented on a diff in the pull request:
https://github.com/apache/spark/pull/4111#discussion_r23333304
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -379,6 +379,41 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
}
executorAllocationManager.foreach(_.start())
+ // Use reflection to instantiate listeners specified via the
`spark.extraListeners` configuration
--- End diff --
Nit: Can we group this logic with listenerBus.start() into a separate
method called "setupListenerBus()" and call it in the constructor? The reason
is this logic has to occur before the listenerBus.start() and having them
grouped in a method can better ensure the order is preserved.
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