fix

Author: xingsy97

src/Microsoft.Azure.SignalR.Common/ServiceConnections/MultiEndpointServiceConnectionContainer.cs

@@ -233,11 +233,10 @@ internal IEnumerable<ServiceEndpoint> GetRoutedEndpoints(ServiceMessage message)
                 case ClientInvocationMessage clientInvocationMessage:
                     return _router.GetEndpointsForConnection(clientInvocationMessage.ConnectionId, endpoints);
 
-                case ServiceMappingMessage serviceMappingMessage:
-                    return _router.GetEndpointsForBroadcast(endpoints);
-
                 case ServiceCompletionMessage serviceCompletionMessage:
-                    return _router.GetEndpointsForBroadcast(endpoints);
+                    return _router.GetEndpointsForConnection(serviceCompletionMessage.ConnectionId, endpoints);
+
+                // ServiceMappingMessage should never be sent to the service
 
                 default:
                     throw new NotSupportedException(message.GetType().Name);

src/Microsoft.Azure.SignalR/ClientInvocation/CallerClientResultsManager.cs

@@ -43,11 +43,8 @@ public Task<T> AddInvocation<T>(string hub, string connectionId, string invocati
                 cancellationToken,
                 () => TryCompleteResult(connectionId, CompletionMessage.WithError(invocationId, "Canceled")));
 
-            var ackNumber = 1;
-            if (_serviceEndpointManager != null && _endpointRouter != null) {
-                var serviceEndpoints = _serviceEndpointManager.GetEndpoints(hub);
-                ackNumber = _endpointRouter.GetEndpointsForConnection(connectionId, serviceEndpoints).Count();
-            }
+            var serviceEndpoints = _serviceEndpointManager.GetEndpoints(hub);
+            var ackNumber = _endpointRouter.GetEndpointsForConnection(connectionId, serviceEndpoints).Count();
 
             var multiAck = _ackHandler.CreateMultiAck(out var ackId);