Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3710#discussion_r22619353
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/LiveListenerBus.scala ---
@@ -118,7 +127,7 @@ private[spark] class LiveListenerBus extends
SparkListenerBus with Logging {
* Log an error message to indicate that the event queue is full. Do
this only once.
*/
private def logQueueFullErrorMessage(): Unit = {
- if (!queueFullErrorMessageLogged) {
+ if (queueFullErrorMessageLogged.compareAndSet(false, true)) {
--- End diff --
How bad is this race condition? The worst thing that can happen is that we
log the same error message multiple times. Is my understanding correct?
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