Akka.net cluster singleton example

cluster config TraderActor SM host

cluster {
                seed-nodes = ["akka.tcp://TradingRoomActors@localhost:8083"]
                roles = ["traderworker"]
                singleton {
                  singleton-name = "TraderActor"
                  role = "traderworker"
                  hand-over-retry-interval = 1s
                }
                singleton-proxy {
                  singleton-name = "TradesActor"
                  role = "tradesworker"
                  singleton-identification-interval = 1s
                  buffer-size = 100
                }
            }         

cluster config TradesActor SM host

cluster {
                seed-nodes = ["akka.tcp://TradingRoomActors@localhost:8083"]
                roles = ["tradesworker"]
                singleton {
                  singleton-name = "TradesActor"
                  role = "tradesworker"
                  hand-over-retry-interval = 1s
                }
                singleton-proxy {
                  singleton-name = "TraderActor"
                  role = "traderworker"
                  singleton-identification-interval = 1s
                  buffer-size = 100
                }
            }         

@Greatsamps Adding these configs should make your sample work OOB.

Alternatively you can change your Boostrap method to something like this:

   public static IActorRef BootstrapSingleton<T>(this ActorSystem system, string name, string role = null) where T : ActorBase
        {
            var props = ClusterSingletonManager.Props(
                singletonProps: Props.Create<T>(),
                settings: new ClusterSingletonManagerSettings(name, role, TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(3)));
            return system.ActorOf(props, typeof(T).Name);
        }

        public static IActorRef BootstrapSingletonProxy(this ActorSystem system, string name, string role, string path, string proxyname)
        {
            var props = ClusterSingletonProxy.Props(
                singletonManagerPath: path,
                settings: new ClusterSingletonProxySettings(name, role, TimeSpan.FromSeconds(1), 100));

            return system.ActorOf(props, proxyname);
        }

With for example when creating a proxy for the TradesActor:

var proxy = tradingRoomActors.BootstrapSingletonProxy("TradesActor","tradesworker","/user/TradesActor", "tradesActorProxy");