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via Google Groups by Ronny Bräunlich, 1 year ago
java.lang.String cannot be cast to akka.http.javadsl.model.ws.Message
java.lang.ClassCastException: java.lang.String cannot be cast to 
akka.http.javadsl.model.ws.Message	at akka.stream.impl.fusing.Map$$anon$8.onPush(Ops.scala:42)	at akka.stream.impl.fusing.GraphInterpreter.processPush(GraphInterpreter.scala:747)	at akka.stream.impl.fusing.GraphInterpreter.processEvent(GraphInterpreter.scala:710)	at akka.stream.impl.fusing.GraphInterpreter.execute(GraphInterpreter.scala:616)	at akka.stream.impl.fusing.GraphInterpreterShell.runBatch(ActorGraphInterpreter.scala:471)	at akka.stream.impl.fusing.GraphInterpreterShell.receive(ActorGraphInterpreter.scala:410)	at akka.stream.impl.fusing.ActorGraphInterpreter.akka$stream$impl$fusing$ActorGraphInterpreter$$processEvent(ActorGraphInterpreter.scala:603)	at akka.stream.impl.fusing.ActorGraphInterpreter$$anonfun$receive$1.applyOrElse(ActorGraphInterpreter.scala:618)	at akka.actor.Actor.aroundReceive(Actor.scala:484)	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)	at akka.actor.ActorCell.invoke(ActorCell.scala:495)	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)	at akka.dispatch.Mailbox.run(Mailbox.scala:224)	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)