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ScanAsync did not complete in all scenarios #24036 (#24090)

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Johan Andrén 2017-12-05 09:08:33 +01:00 • committed by Christopher Batey
parent 3eed8e79d0
commit d52be450f3
2 changed files with 40 additions and 3 deletions
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14
akka-stream/src/main/scala/akka/stream/impl/fusing/Ops.scala
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@ -432,7 +432,8 @@ private[stream] object Collect {
private lazy val decider = inheritedAttributes.get[SupervisionStrategy].map(_.decider).getOrElse(Supervision.stoppingDecider)
private val ZeroHandler: OutHandler with InHandler = new OutHandler with InHandler {
override def onPush(): Unit = ()
override def onPush(): Unit =
throw new IllegalStateException("No push should happen before zero value has been consumed")
override def onPull(): Unit = {
push(out, current)
@ -507,7 +508,16 @@ private[stream] object Collect {
}
}
override def onUpstreamFinish(): Unit = {}
override def onUpstreamFinish(): Unit = {
if (current == zero) {
eventualCurrent.value match {
case Some(Success(`zero`)) ⇒
// #24036 upstream completed without emitting anything but after zero was emitted downstream
completeStage()
case _ ⇒ // in all other cases we will get a complete when the future completes
}
}
}
override val toString: String = s"ScanAsync.Logic(completed=${eventualCurrent.isCompleted})"
}