Created
February 17, 2016 15:58
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Akka Stream Stackoverflow Exception
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| import akka.actor.ActorSystem | |
| import akka.stream.{ActorMaterializer, SourceShape} | |
| import akka.stream.scaladsl._ | |
| object CrashDemo extends App { | |
| implicit val system = ActorSystem("error-reproduction-demo") | |
| implicit val mat = ActorMaterializer() | |
| import system.dispatcher | |
| val numbers = Source(1 to 1000) | |
| val numberOfFlows = 5000 | |
| Source.fromGraph(GraphDSL.create() { implicit builder: GraphDSL.Builder[Unit] => | |
| import GraphDSL.Implicits._ | |
| val bcast = builder.add(Broadcast[Int](numberOfFlows)) | |
| val merge = builder.add(Merge[Int](numberOfFlows)) | |
| numbers ~> bcast | |
| for (x ← 1 to numberOfFlows) { | |
| bcast.out(x - 1) ~> Flow[Int].map(x ⇒ x * x) ~> merge.in(x - 1) | |
| } | |
| SourceShape(merge.out) | |
| }).runForeach(println).onComplete(_ ⇒ system.terminate()) | |
| } |
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| Exception in thread "main" java.lang.StackOverflowError | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| at akka.stream.impl.fusing.Fusing$.rewriteMat(Fusing.scala:415) | |
| .... |
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