tenglei commented on code in PR #38181:
URL: https://github.com/apache/spark/pull/38181#discussion_r990872972
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core/src/main/scala/org/apache/spark/scheduler/AsyncEventQueue.scala:
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@@ -154,8 +154,9 @@ private class AsyncEventQueue(
return
}
- eventCount.incrementAndGet()
- if (eventQueue.offer(event)) {
+ if (eventQueue.offer(event, conf.get(LISTENER_BUS_EVENT_QUEUE_TIMEOUT),
+ TimeUnit.MILLISECONDS)) {
Review Comment:
Blocking only occurs when the eventQueue is full, and a full eventQueue
means that the load on the current driver is already relatively high, and
continuing to allow individual events to be generated will affect the overall
speed of processing jobs. After several tests on my end, when the queue is full
and the timeout is set to 30s, there is instead a performance improvement of
around 5% in a high concurrency scenario (compared to before the modification)
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