Hey,
I have a Source that merges ActorPublishers, this is a simplification :
Source[Foo]() { implicit b =>
val actorSources = myActorPublisherArray
b.add(Merge[Foo](actorSources.length))
for (i <- 0 until actorSources.length) {
b.addEdge(b.add(actorSources(i)), merge.in(i))
}
merge.out
}
}
class MyActorPublisher extends ActorPublisher[Foo] {
var batchIterator = someBlockingIterator
def pushNext: Boolean = {
if (batchIterator.hasNext) {
val nextMnfResource = batchIterator.next()
onNext(nextMnfResource)
true
} else {
onCompleteThenStop()
false
}
}
def receive: Receive = {
case Request(n) if totalDemand > 0 && isActive =>
(1L to Math.min(n, totalDemand)).foldLeft(true) {
case (acc,i) => if (acc) pushNext else false
}
case Cancel =>
context.stop(self)
}
}
But the stream is idling most of the time with like 1% CPU usage like there
was no `pull demand` for some reason... I'm trying to reproduce it and find
the catch for 2 days already.
Any idea why that could be? I think it started with RC1 or RC2 when I set
Flow#mapAsync(parallelism) as required in following Flows, I removed all
custom "Stages" and I don't really do anything except Map and MapAsync in
flows...
Also it doesn't seem to be happening with
.withInputBuffer (
initialSize = 1,
maxSize = 1
)
But then the throughtput is insufficient...
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