diff --git a/go.mod b/go.mod
index 4e7635f..d7d1a6b 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/golang/protobuf v1.4.3
 	github.com/google/go-cmp v0.5.1 // indirect
 	github.com/unistack-org/micro-codec-bytes v0.0.0-20200828083432-4e49e953d844
-	github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201102230232-8a2b12201568
+	github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e
 	golang.org/x/net v0.0.0-20200904194848-62affa334b73
 	golang.org/x/sys v0.0.0-20200803210538-64077c9b5642 // indirect
 	golang.org/x/text v0.3.3 // indirect
diff --git a/go.sum b/go.sum
index 6ae579f..1b9bc29 100644
--- a/go.sum
+++ b/go.sum
@@ -281,8 +281,8 @@ github.com/unistack-org/micro/v3 v3.0.0-gamma/go.mod h1:iEtpu3wTYCRs3pQ3VsFEO7JB
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200909210629-caec730248b1/go.mod h1:mmqHR9WelHUXqg2mELjsQ+FJHcWs6mNmXg+wEYO2T3c=
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200920135754-1cbd1d2bad83/go.mod h1:HUzMG4Mcy97958VxWTg8zuazZgwQ/aoLZ8wtBVONwRE=
 github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200922103357-4c4fa00a5d94/go.mod h1:aL+8VhSXpx0SuEeXPOWUo5BgS7kyvWYobeXFay90UUM=
-github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201102230232-8a2b12201568 h1:2h+k414Q3ABTRHByIvPJYZbi5s8qlCi9yG7x3wqaFDs=
-github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201102230232-8a2b12201568/go.mod h1:LFvCXGOgcLIj2k/8eL71TpIpcJBN2SXXAUx8U6dz9Rw=
+github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e h1:v27OUgoE2UOyCe6uLksdpG6oErx62nUXWIkTPxS7yIw=
+github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20201104214903-1fbf8b2e209e/go.mod h1:LFvCXGOgcLIj2k/8eL71TpIpcJBN2SXXAUx8U6dz9Rw=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 github.com/vultr/govultr v0.1.4/go.mod h1:9H008Uxr/C4vFNGLqKx232C206GL0PBHzOP0809bGNA=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
diff --git a/grpc.go b/grpc.go
index 9ca1f78..90e20f7 100644
--- a/grpc.go
+++ b/grpc.go
@@ -225,14 +225,20 @@ func (g *grpcServer) getListener() net.Listener {
 func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err error) {
 	defer func() {
 		if r := recover(); r != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Error("panic recovered: ", r)
-				logger.Error(string(debug.Stack()))
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("panic recovered: ", r)
+				config.Logger.Error(string(debug.Stack()))
 			}
 			err = errors.InternalServerError(g.opts.Name, "panic recovered: %v", r)
 		} else if err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("grpc handler got error: %s", err)
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("grpc handler got error: %s", err)
 			}
 		}
 	}()
@@ -364,7 +370,12 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 		typ := reflect.TypeOf(rfl)
 		if me, ok := typ.MethodByName("ServerReflectionInfo"); ok {
 			g.rpc.mu.Lock()
-			svc.method["ServerReflectionInfo"] = prepareEndpoint(me)
+			ep, err := prepareEndpoint(me)
+			if ep != nil && err != nil {
+				svc.method["ServerReflectionInfo"] = ep
+			} else if err != nil {
+				return status.New(codes.Unimplemented, err.Error()).Err()
+			}
 			g.rpc.mu.Unlock()
 		}
 	}
@@ -476,8 +487,11 @@ func (g *grpcServer) processRequest(stream grpc.ServerStream, service *service,
 					return err
 				}
 			default:
-				if logger.V(logger.ErrorLevel) {
-					logger.Warn("handler error will not be transferred properly, must return *errors.Error or proto.Message")
+				g.RLock()
+				config := g.opts
+				g.RUnlock()
+				if config.Logger.V(logger.ErrorLevel) {
+					config.Logger.Warn("handler error will not be transferred properly, must return *errors.Error or proto.Message")
 				}
 				// default case user pass own error type that not proto based
 				statusCode = convertCode(verr)
@@ -598,8 +612,11 @@ func (g *grpcServer) processStream(stream grpc.ServerStream, service *service, m
 				return err
 			}
 		default:
-			if logger.V(logger.ErrorLevel) {
-				logger.Warn("handler error will not be transferred properly, must return *errors.Error or proto.Message")
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Warn("handler error will not be transferred properly, must return *errors.Error or proto.Message")
 			}
 			// default case user pass own error type that not proto based
 			statusCode = convertCode(verr)
@@ -767,8 +784,8 @@ func (g *grpcServer) Register() error {
 	g.RUnlock()
 
 	if !registered {
-		if logger.V(logger.InfoLevel) {
-			logger.Infof("Registry [%s] Registering node: %s", config.Registry.String(), service.Nodes[0].Id)
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Info("Registry [%s] Registering node: %s", config.Registry.String(), service.Nodes[0].Id)
 		}
 	}
 
@@ -799,8 +816,8 @@ func (g *grpcServer) Register() error {
 		opts = append(opts, broker.SubscribeContext(subCtx))
 		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
 
-		if logger.V(logger.InfoLevel) {
-			logger.Infof("Subscribing to topic: %s", sb.Topic())
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Info("Subscribing to topic: %s", sb.Topic())
 		}
 		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
 		if err != nil {
@@ -829,8 +846,8 @@ func (g *grpcServer) Deregister() error {
 		return err
 	}
 
-	if logger.V(logger.InfoLevel) {
-		logger.Infof("Deregistering node: %s", service.Nodes[0].Id)
+	if config.Logger.V(logger.InfoLevel) {
+		config.Logger.Info("Deregistering node: %s", service.Nodes[0].Id)
 	}
 
 	opt := registry.DeregisterDomain(g.opts.Namespace)
@@ -854,12 +871,12 @@ func (g *grpcServer) Deregister() error {
 			wg.Add(1)
 			go func(s broker.Subscriber) {
 				defer wg.Done()
-				if logger.V(logger.InfoLevel) {
-					logger.Infof("Unsubscribing from topic: %s", s.Topic())
+				if config.Logger.V(logger.InfoLevel) {
+					config.Logger.Info("Unsubscribing from topic: %s", s.Topic())
 				}
 				if err := s.Unsubscribe(g.opts.Context); err != nil {
-					if logger.V(logger.ErrorLevel) {
-						logger.Errorf("Unsubscribing from topic: %s err: %v", s.Topic(), err)
+					if config.Logger.V(logger.ErrorLevel) {
+						config.Logger.Error("Unsubscribing from topic: %s err: %v", s.Topic(), err)
 					}
 				}
 			}(sub)
@@ -908,8 +925,8 @@ func (g *grpcServer) Start() error {
 		}
 	}
 
-	if logger.V(logger.InfoLevel) {
-		logger.Infof("Server [grpc] Listening on %s", ts.Addr().String())
+	if config.Logger.V(logger.InfoLevel) {
+		config.Logger.Info("Server [grpc] Listening on %s", ts.Addr().String())
 	}
 	g.Lock()
 	g.opts.Address = ts.Addr().String()
@@ -922,27 +939,27 @@ func (g *grpcServer) Start() error {
 	if len(g.subscribers) > 0 {
 		// connect to the broker
 		if err := config.Broker.Connect(config.Context); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("Broker [%s] connect error: %v", config.Broker.String(), err)
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("Broker [%s] connect error: %v", config.Broker.String(), err)
 			}
 			return err
 		}
 
-		if logger.V(logger.InfoLevel) {
-			logger.Infof("Broker [%s] Connected to %s", config.Broker.String(), config.Broker.Address())
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Info("Broker [%s] Connected to %s", config.Broker.String(), config.Broker.Address())
 		}
 	}
 
 	// use RegisterCheck func before register
 	if err := g.opts.RegisterCheck(config.Context); err != nil {
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("Server %s-%s register check error: %s", config.Name, config.Id, err)
+		if config.Logger.V(logger.ErrorLevel) {
+			config.Logger.Error("Server %s-%s register check error: %s", config.Name, config.Id, err)
 		}
 	} else {
 		// announce self to the world
 		if err := g.Register(); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("Server register error: %v", err)
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("Server register error: %v", err)
 			}
 		}
 	}
@@ -950,12 +967,12 @@ func (g *grpcServer) Start() error {
 	// micro: go ts.Accept(s.accept)
 	go func() {
 		if err := g.srv.Serve(ts); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("gRPC Server start error: %v", err)
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("gRPC Server start error: %v", err)
 			}
 			if err := g.Stop(); err != nil {
-				if logger.V(logger.ErrorLevel) {
-					logger.Errorf("gRPC Server stop error: %v", err)
+				if config.Logger.V(logger.ErrorLevel) {
+					config.Logger.Error("gRPC Server stop error: %v", err)
 				}
 			}
 		}
@@ -983,24 +1000,24 @@ func (g *grpcServer) Start() error {
 				g.RUnlock()
 				rerr := g.opts.RegisterCheck(g.opts.Context)
 				if rerr != nil && registered {
-					if logger.V(logger.ErrorLevel) {
-						logger.Errorf("Server %s-%s register check error: %s, deregister it", config.Name, config.Id, rerr)
+					if config.Logger.V(logger.ErrorLevel) {
+						config.Logger.Error("Server %s-%s register check error: %s, deregister it", config.Name, config.Id, rerr)
 					}
 					// deregister self in case of error
 					if err := g.Deregister(); err != nil {
-						if logger.V(logger.ErrorLevel) {
-							logger.Errorf("Server %s-%s deregister error: %s", config.Name, config.Id, err)
+						if config.Logger.V(logger.ErrorLevel) {
+							config.Logger.Error("Server %s-%s deregister error: %s", config.Name, config.Id, err)
 						}
 					}
 				} else if rerr != nil && !registered {
-					if logger.V(logger.ErrorLevel) {
-						logger.Errorf("Server %s-%s register check error: %s", config.Name, config.Id, rerr)
+					if config.Logger.V(logger.ErrorLevel) {
+						config.Logger.Error("Server %s-%s register check error: %s", config.Name, config.Id, rerr)
 					}
 					continue
 				}
 				if err := g.Register(); err != nil {
-					if logger.V(logger.ErrorLevel) {
-						logger.Errorf("Server %s-%s register error: %s", config.Name, config.Id, err)
+					if config.Logger.V(logger.ErrorLevel) {
+						config.Logger.Error("Server %s-%s register error: %s", config.Name, config.Id, err)
 					}
 				}
 			// wait for exit
@@ -1011,8 +1028,8 @@ func (g *grpcServer) Start() error {
 
 		// deregister self
 		if err := g.Deregister(); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Error("Server deregister error: ", err)
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("Server deregister error: ", err)
 			}
 		}
 
@@ -1038,13 +1055,13 @@ func (g *grpcServer) Start() error {
 		// close transport
 		ch <- nil
 
-		if logger.V(logger.InfoLevel) {
-			logger.Infof("Broker [%s] Disconnected from %s", config.Broker.String(), config.Broker.Address())
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Info("Broker [%s] Disconnected from %s", config.Broker.String(), config.Broker.Address())
 		}
 		// disconnect broker
 		if err := config.Broker.Disconnect(config.Context); err != nil {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("Broker [%s] disconnect error: %v", config.Broker.String(), err)
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Error("Broker [%s] disconnect error: %v", config.Broker.String(), err)
 			}
 		}
 	}()
diff --git a/server.go b/server.go
index 2c7e215..84df065 100644
--- a/server.go
+++ b/server.go
@@ -14,7 +14,6 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/server"
 )
 
@@ -66,7 +65,7 @@ func isExportedOrBuiltinType(t reflect.Type) bool {
 
 // prepareEndpoint() returns a methodType for the provided method or nil
 // in case if the method was unsuitable.
-func prepareEndpoint(method reflect.Method) *methodType {
+func prepareEndpoint(method reflect.Method) (*methodType, error) {
 	mtype := method.Type
 	mname := method.Name
 	var replyType, argType, contextType reflect.Type
@@ -74,7 +73,7 @@ func prepareEndpoint(method reflect.Method) *methodType {
 
 	// Endpoint() must be exported.
 	if method.PkgPath != "" {
-		return nil
+		return nil, fmt.Errorf("Endpoint must be exported")
 	}
 
 	switch mtype.NumIn() {
@@ -89,63 +88,42 @@ func prepareEndpoint(method reflect.Method) *methodType {
 		replyType = mtype.In(3)
 		contextType = mtype.In(1)
 	default:
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
 	}
 
 	if stream {
 		// check stream type
 		streamType := reflect.TypeOf((*server.Stream)(nil)).Elem()
 		if !argType.Implements(streamType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("%v argument does not implement Streamer interface: %v", mname, argType)
-			}
-			return nil
+			return nil, fmt.Errorf("%v argument does not implement Streamer interface: %v", mname, argType)
 		}
 	} else {
 		// if not stream check the replyType
 
 		// First arg need not be a pointer.
 		if !isExportedOrBuiltinType(argType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("%v argument type not exported: %v", mname, argType)
-			}
-			return nil
+			return nil, fmt.Errorf("%v argument type not exported: %v", mname, argType)
 		}
 
 		if replyType.Kind() != reflect.Ptr {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("method %v reply type not a pointer: %v", mname, replyType)
-			}
-			return nil
+			return nil, fmt.Errorf("method %v reply type not a pointer: %v", mname, replyType)
 		}
 
 		// Reply type must be exported.
 		if !isExportedOrBuiltinType(replyType) {
-			if logger.V(logger.ErrorLevel) {
-				logger.Errorf("method %v reply type not exported: %v", mname, replyType)
-			}
-			return nil
+			return nil, fmt.Errorf("method %v reply type not exported: %v", mname, replyType)
 		}
 	}
 
 	// Endpoint() needs one out.
 	if mtype.NumOut() != 1 {
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v has wrong number of outs: %v", mname, mtype.NumOut())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v has wrong number of outs: %v", mname, mtype.NumOut())
 	}
 	// The return type of the method must be error.
 	if returnType := mtype.Out(0); returnType != typeOfError {
-		if logger.V(logger.ErrorLevel) {
-			logger.Errorf("method %v returns %v not error", mname, returnType.String())
-		}
-		return nil
+		return nil, fmt.Errorf("method %v returns %v not error", mname, returnType.String())
 	}
-	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
+	return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}, nil
 }
 
 func (server *rServer) register(rcvr interface{}) error {
@@ -162,11 +140,7 @@ func (server *rServer) register(rcvr interface{}) error {
 		return fmt.Errorf("rpc: no service name for type %v", s.typ.String())
 	}
 	if !isExported(sname) {
-		s := "rpc Register: type " + sname + " is not exported"
-		if logger.V(logger.ErrorLevel) {
-			logger.Error(s)
-		}
-		return fmt.Errorf(s)
+		return fmt.Errorf("rpc Register: type %s is not exported", sname)
 	}
 	if _, present := server.serviceMap[sname]; present {
 		return fmt.Errorf("rpc: service already defined: " + sname)
@@ -177,17 +151,16 @@ func (server *rServer) register(rcvr interface{}) error {
 	// Install the methods
 	for m := 0; m < s.typ.NumMethod(); m++ {
 		method := s.typ.Method(m)
-		if mt := prepareEndpoint(method); mt != nil {
+		mt, err := prepareEndpoint(method)
+		if mt != nil && err == nil {
 			s.method[method.Name] = mt
+		} else if err != nil {
+			return err
 		}
 	}
 
 	if len(s.method) == 0 {
-		s := "rpc Register: type " + sname + " has no exported methods of suitable type"
-		if logger.V(logger.ErrorLevel) {
-			logger.Error(s)
-		}
-		return fmt.Errorf(s)
+		return fmt.Errorf("rpc Register: type %s has no exported methods of suitable type", sname)
 	}
 	server.serviceMap[s.name] = s
 	return nil