srowen commented on code in PR #50020:
URL: https://github.com/apache/spark/pull/50020#discussion_r1981403211
##########
core/src/main/scala/org/apache/spark/BarrierCoordinator.scala:
##########
@@ -80,8 +81,9 @@ private[spark] class BarrierCoordinator(
states.forEachValue(1, clearStateConsumer)
states.clear()
listenerBus.removeListener(listener)
- ThreadUtils.shutdown(timer)
} finally {
+ timerFuture.foreach(_.cancel(true))
+ ThreadUtils.shutdown(timer)
Review Comment:
Right. Why would you not do _both_? because this change doesn't seem to
resolve any issue with daemon threads. I agree it does a better job cancelling
things when the JVM _has not exited_.
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