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akka.ConfigurationException: ActorSystem [akka://master] needs to have a 'ClusterActorRefProvider' enabled in the configuration, currently uses [akka.remote.RemoteActorRefProvider]	at akka.cluster.Cluster.(Cluster.scala:79)	at akka.cluster.Cluster$.createExtension(Cluster.scala:42)	at akka.cluster.Cluster$.createExtension(Cluster.scala:37)	at akka.actor.ActorSystemImpl.registerExtension(ActorSystem.scala:713)	at akka.actor.ExtensionId$class.apply(Extension.scala:79)	at akka.cluster.Cluster$.apply(Cluster.scala:37)	at io.gearpump.cluster.master.ClusterReplication$class.$init$(ClusterReplication.scala:43)	at io.gearpump.cluster.master.InMemoryKVService.(InMemoryKVService.scala:31)	at io.gearpump.cluster.master.Master$$anonfun$1.apply(Master.scala:58)	at io.gearpump.cluster.master.Master$$anonfun$1.apply(Master.scala:58)	at akka.actor.TypedCreatorFunctionConsumer.produce(Props.scala:343)	at akka.actor.Props.newActor(Props.scala:252)	at akka.actor.ActorCell.newActor(ActorCell.scala:552)	at akka.actor.ActorCell.create(ActorCell.scala:578)	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:456)	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478)	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:263)	at akka.dispatch.Mailbox.run(Mailbox.scala:219)	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)	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)