Github user reggert commented on a diff in the pull request:
https://github.com/apache/spark/pull/9264#discussion_r44576009
--- Diff: core/src/main/scala/org/apache/spark/scheduler/JobWaiter.scala ---
@@ -49,29 +51,14 @@ private[spark] class JobWaiter[T](
dagScheduler.cancelJob(jobId)
}
- override def taskSucceeded(index: Int, result: Any): Unit = synchronized
{
- if (_jobFinished) {
- throw new UnsupportedOperationException("taskSucceeded() called on a
finished JobWaiter")
- }
+ override def taskSucceeded(index: Int, result: Any): Unit = {
--- End diff --
I wonder... do we need to also put some sort of synchronization around
`resultFunc` in `SimpleFutureAction` to ensure that the thread that reads the
result can see all the writes?
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