diff --git a/common/constant/env.go b/common/constant/env.go
index f0e4fabe02cb09f63173bc9fe0cbf83885bdefb6..c2bc3c4bc3e474d5b004af3a997564eec1e975e8 100644
--- a/common/constant/env.go
+++ b/common/constant/env.go
@@ -20,5 +20,5 @@ package constant
 const (
 	CONF_CONSUMER_FILE_PATH        = "CONF_CONSUMER_FILE_PATH"
 	CONF_PROVIDER_FILE_PATH        = "CONF_PROVIDER_FILE_PATH"
-	APP_LOG_CONF_FILE       string = "APP_LOG_CONF_FILE"
+	APP_LOG_CONF_FILE              = "APP_LOG_CONF_FILE"
 )
diff --git a/config/config_loader.go b/config/config_loader.go
index 0b48761fd63b713b66f7b1b92f62b682dda5c927..b737d3f233700f596469cfd678aa7ae7f9a82b85 100644
--- a/config/config_loader.go
+++ b/config/config_loader.go
@@ -54,6 +54,7 @@ func init() {
 		providerConfig = nil
 	}
 }
+
 func checkRegistries(registries map[string]*RegistryConfig, singleRegistry *RegistryConfig) {
 	if len(registries) == 0 && singleRegistry != nil {
 		registries[constant.DEFAULT_KEY] = singleRegistry
diff --git a/registry/nacos/registry.go b/registry/nacos/registry.go
index 7025b3e5d4aaa992d58f08ca4802c4f66b2b337b..229c6f8f0cea862b5ac676fe9d0d3f34cc6ed1b4 100644
--- a/registry/nacos/registry.go
+++ b/registry/nacos/registry.go
@@ -182,7 +182,7 @@ func (nr *nacosRegistry) Subscribe(url *common.URL, notifyListener registry.Noti
 
 		listener, err := nr.subscribe(url)
 		if err != nil {
-			if !r.IsAvailable() {
+			if !nr.IsAvailable() {
 				logger.Warnf("event listener game over.")
 				return
 			}