Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3710#discussion_r22617594
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/LiveListenerBus.scala ---
@@ -27,7 +28,8 @@ import org.apache.spark.util.Utils
*
* Until start() is called, all posted events are only buffered. Only
after this listener bus
* has started will events be actually propagated to all attached
listeners. This listener bus
- * is stopped when it receives a SparkListenerShutdown event, which is
posted using stop().
+ * will be stopped when stop() is called. After `stop()` is called, it
won't accept new events.
+ * However, for the events in the bufer, it will still process them before
it exits.
--- End diff --
`However, it will still process events in the buffer before it exits.`
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