diff --git a/clients/naming_client/naming_cache/subscribe_callback.go b/clients/naming_client/naming_cache/subscribe_callback.go
index 1f4964db..1c891e24 100644
--- a/clients/naming_client/naming_cache/subscribe_callback.go
+++ b/clients/naming_client/naming_cache/subscribe_callback.go
@@ -56,6 +56,8 @@ func (ed *SubscribeCallback) AddCallbackFunc(serviceName string, clusters string
 func (ed *SubscribeCallback) RemoveCallbackFunc(serviceName string, clusters string, callbackFunc *func(services []model.Instance, err error)) {
 	logger.Info("removing " + serviceName + " with " + clusters + " to listener map")
 	key := util.GetServiceCacheKey(serviceName, clusters)
+	defer ed.mux.Unlock()
+	ed.mux.Lock()
 	funcs, ok := ed.callbackFuncMap.Get(key)
 	if ok && funcs != nil {
 		var newFuncs []*func(services []model.Instance, err error)
diff --git a/clients/naming_client/naming_cache/subscribe_callback_test.go b/clients/naming_client/naming_cache/subscribe_callback_test.go
index fce3354a..6bcef6cd 100644
--- a/clients/naming_client/naming_cache/subscribe_callback_test.go
+++ b/clients/naming_client/naming_cache/subscribe_callback_test.go
@@ -30,25 +30,6 @@ import (
 )
 
 func TestEventDispatcher_AddCallbackFuncs(t *testing.T) {
-	service := model.Service{
-		Clusters:    strings.Join([]string{"default"}, ","),
-		CacheMillis: 10000,
-		Checksum:    "abcd",
-		LastRefTime: uint64(time.Now().Unix()),
-	}
-	var hosts []model.Instance
-	host := model.Instance{
-		Enable:      true,
-		InstanceId:  "123",
-		Port:        8080,
-		Ip:          "127.0.0.1",
-		Weight:      10,
-		ServiceName: "public@@Test",
-		ClusterName: strings.Join([]string{"default"}, ","),
-	}
-	hosts = append(hosts, host)
-	service.Hosts = hosts
-
 	ed := NewSubscribeCallback()
 	param := vo.SubscribeParam{
 		ServiceName: "Test",
@@ -70,25 +51,6 @@ func TestEventDispatcher_AddCallbackFuncs(t *testing.T) {
 }
 
 func TestEventDispatcher_RemoveCallbackFuncs(t *testing.T) {
-	service := model.Service{
-		Clusters:    strings.Join([]string{"default"}, ","),
-		CacheMillis: 10000,
-		Checksum:    "abcd",
-		LastRefTime: uint64(time.Now().Unix()),
-	}
-	var hosts []model.Instance
-	host := model.Instance{
-		Enable:      true,
-		InstanceId:  "123",
-		Port:        8080,
-		Ip:          "127.0.0.1",
-		Weight:      10,
-		ServiceName: "public@@Test",
-		ClusterName: strings.Join([]string{"default"}, ","),
-	}
-	hosts = append(hosts, host)
-	service.Hosts = hosts
-
 	ed := NewSubscribeCallback()
 	param := vo.SubscribeParam{
 		ServiceName: "Test",
@@ -170,6 +132,6 @@ func TestSubscribeCallback_ServiceChanged(t *testing.T) {
 		},
 	}
 	ed.AddCallbackFunc(util.GetGroupName(param2.ServiceName, param2.GroupName), strings.Join(param2.Clusters, ","), &param2.SubscribeCallback)
-	cacheKey := util.GetServiceCacheKey(util.GetGroupName(service.Name, service.GroupName), service.Clusters)
+	cacheKey := util.GetServiceCacheKey(service.Name, service.Clusters)
 	ed.ServiceChanged(cacheKey, &service)
 }