He-Pin commented on code in PR #981:
URL: https://github.com/apache/incubator-pekko/pull/981#discussion_r1458938355
##########
stream/src/main/scala/org/apache/pekko/stream/impl/fusing/StreamOfStreams.scala:
##########
@@ -614,14 +607,31 @@ import pekko.util.ccompat.JavaConverters._
override def onDownstreamFinish(cause: Throwable): Unit = {
substreamCancelled = true
- if (isClosed(in) || propagateSubstreamCancel(cause)) {
- cancelStage(cause)
- } else {
- // Start draining
- if (!hasBeenPulled(in)) pull(in)
+ decider(cause) match {
+ case Supervision.Stop =>
+ cancelStage(cause)
+ case Supervision.Resume =>
+ if (isClosed(in)) cancelStage(cause)
+ else {
+ // Start draining
+ if (!hasBeenPulled(in)) pull(in)
+ }
+ case Supervision.Restart =>
+ if (isClosed(in)) completeStage()
+ else {
+ restartState()
+ // Start draining
+ if (!hasBeenPulled(in)) pull(in)
+ }
Review Comment:
I'm not sure about this, it was restart the `sink` not the upstream
`subFlow`.
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