Github user bOOm-X commented on a diff in the pull request: https://github.com/apache/spark/pull/18083#discussion_r120619672 --- Diff: core/src/main/scala/org/apache/spark/util/ListenerBus.scala --- @@ -56,14 +68,25 @@ private[spark] trait ListenerBus[L <: AnyRef, E] extends Logging { // JavaConverters can create a JIterableWrapper if we use asScala. // However, this method will be called frequently. To avoid the wrapper cost, here we use // Java Iterator directly. - val iter = listeners.iterator + val iter = listenersPlusTimers.iterator while (iter.hasNext) { - val listener = iter.next() + val listenerAndMaybeTimer = iter.next() + val listener = listenerAndMaybeTimer._1 + val maybeTimer = listenerAndMaybeTimer._2 + var maybeTimerContext = if (maybeTimer != null) { --- End diff -- Indeed ! But you can put the option in the collection listenersPlusTimers (instead of doing a orNull when you create the timer) and so you can use it without having to recreate one each time in the postToAll method
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