fix : fix credential process logic for nacos mcp util and add ut for it (#2394)

registry/nacos/mcpserver/client.go

@@ -368,10 +368,13 @@ func (n *NacosRegistryClient) replaceTemplateAndExactConfigsItems(ctx *ServerCon
 func (n *NacosRegistryClient) resetNacosTemplateConfigs(ctx *ServerContext, config *ConfigListenerWrap) {
 	newCredentials := n.replaceTemplateAndExactConfigsItems(ctx, config)
 
+	credentialsNeedDelete := []string{}
+
 	// cancel all old config listener
 	for key, wrap := range ctx.configsMap {
 		if strings.HasPrefix(key, CredentialPrefix) {
 			if _, ok := newCredentials[key]; !ok {
+				credentialsNeedDelete = append(credentialsNeedDelete, key)
 				err := n.cancelListenToConfig(wrap)
 				if err != nil {
 					mcpServerLog.Errorf("cancel listen to old credential listener error %v", err)
@@ -381,6 +384,10 @@ func (n *NacosRegistryClient) resetNacosTemplateConfigs(ctx *ServerContext, conf
 		}
 	}
 
+	for _, credentialKey := range credentialsNeedDelete {
+		delete(ctx.configsMap, credentialKey)
+	}
+
 	for _, data := range newCredentials {
 		ctx.configsMap[CredentialPrefix+data.group+"_"+data.dataId] = data
 	}
@@ -457,14 +464,15 @@ func (n *NacosRegistryClient) ListenToConfig(ctx *ServerContext, dataId string,
 	}
 
 	configListener := func(namespace, group, dataId, data string) {
-		if group == McpToolSpecGroup {
-			n.resetNacosTemplateConfigs(ctx, &wrap)
-		} else if group == McpServerSpecGroup {
-			n.refreshServiceListenerIfNeeded(ctx, data)
-		}
-
 		if ctx.serverChangeListener != nil && wrap.data != data {
 			wrap.data = data
+
+			if group == McpToolSpecGroup {
+				n.resetNacosTemplateConfigs(ctx, &wrap)
+			} else if group == McpServerSpecGroup {
+				n.refreshServiceListenerIfNeeded(ctx, data)
+			}
+
 			n.triggerMcpServerChange(ctx.versionedMcpServerInfo.serverInfo.Id)
 		}
 	}