diff --git a/naming/src/main/java/com/alibaba/nacos/naming/core/v2/ServiceManager.java b/naming/src/main/java/com/alibaba/nacos/naming/core/v2/ServiceManager.java
index d85e4d5679e..136f85e6d11 100644
--- a/naming/src/main/java/com/alibaba/nacos/naming/core/v2/ServiceManager.java
+++ b/naming/src/main/java/com/alibaba/nacos/naming/core/v2/ServiceManager.java
@@ -16,7 +16,9 @@
 
 package com.alibaba.nacos.naming.core.v2;
 
+import com.alibaba.nacos.common.notify.NotifyCenter;
 import com.alibaba.nacos.common.utils.ConcurrentHashSet;
+import com.alibaba.nacos.naming.core.v2.event.metadata.MetadataEvent;
 import com.alibaba.nacos.naming.core.v2.pojo.Service;
 
 import java.util.HashSet;
@@ -57,7 +59,10 @@ public Set<Service> getSingletons(String namespace) {
      * @return if service is exist, return exist service, otherwise return new service
      */
     public Service getSingleton(Service service) {
-        singletonRepository.putIfAbsent(service, service);
+        singletonRepository.computeIfAbsent(service, (key) -> {
+            NotifyCenter.publishEvent(new MetadataEvent.ServiceMetadataEvent(service, false));
+            return service;
+        });
         Service result = singletonRepository.get(service);
         namespaceSingletonMaps.computeIfAbsent(result.getNamespace(), (namespace) -> new ConcurrentHashSet<>());
         namespaceSingletonMaps.get(result.getNamespace()).add(result);