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via Google Groups by Manoj Santhakumaran, 1 year ago
akka.dispatch.Envelope cannot be cast to akka.kamon.instrumentation.InstrumentedEnvelope
java.lang.ClassCastException: akka.dispatch.Envelope cannot be cast to 
akka.kamon.instrumentation.InstrumentedEnvelope	at akka.kamon.instrumentation.ActorCellInstrumentation.afterSendMessageInActorCell(ActorInstrumentation.scala:60)	at akka.routing.RoutedActorCell.sendMessage_aroundBody0(RoutedActorCell.scala:138)	at akka.routing.RoutedActorCell$AjcClosure1.run(RoutedActorCell.scala:1)	at org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:149)	at akka.kamon.instrumentation.NoOpRouterMonitor$.processMessage(RouterMonitor.scala:35)	at akka.kamon.instrumentation.RoutedActorCellInstrumentation.aroundSendMessageInRouterActorCell(RouterInstrumentation.scala:29)	at akka.routing.RoutedActorCell.sendMessage(RoutedActorCell.scala:138)	at akka.actor.Cell$class.sendMessage(ActorCell.scala:294)	at akka.actor.ActorCell.sendMessage(ActorCell.scala:373)	at akka.actor.RepointableActorRef.$bang(RepointableActorRef.scala:166)	at akka.io.SelectionHandler$SelectorBasedManager$$anonfun$workerForCommandHandler$1.applyOrElse(SelectionHandler.scala:87)	at akka.actor.Actor$class.aroundReceive(Actor.scala:480)	at akka.io.SelectionHandler$SelectorBasedManager.aroundReceive(SelectionHandler.scala:78)	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:525)	at akka.actor.ActorCell.invoke(ActorCell.scala:494)	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)	at akka.dispatch.Mailbox.run(Mailbox.scala:224)	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)