diff --git a/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java b/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
index 1e86dc6..db6c825 100644
--- a/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
+++ b/im-center-server/src/main/java/cn/axzo/im/group/GroupManager.java
@@ -95,7 +95,7 @@ public class GroupManager {
         GroupCreateResponse response = new GroupCreateResponse();
         response.setTid(nimResponse.getTid());
         response.setAccountsNotFound(getAccountNotFoundPersons(
-                notification, "创建群", imAccounts, group, request.getMembers()));
+                "创建群", imAccounts, group, request.getMembers()));
         return response;
     }
 
@@ -152,7 +152,7 @@ public class GroupManager {
                 MqEventType.GROUP_ADD_MEMBERS);
         GroupAddMembersResponse response = new GroupAddMembersResponse();
         response.setAccountsNotFound(getAccountNotFoundPersons(
-                notification, "添加群成员", imAccounts, group, request.getMembers()));
+                "添加群成员", imAccounts, group, request.getMembers()));
         return response;
     }
 
@@ -205,15 +205,15 @@ public class GroupManager {
     }
 
     public Set<PersonAccountAttribute> getAccountNotFoundPersons(
-            Notification notification, String operation,
-            ImAccounts accounts, Group group, Set<PersonAccountAttribute> persons) {
+            String operation, ImAccounts accounts, Group group,
+            Set<PersonAccountAttribute> persons) {
         if (org.apache.commons.collections.CollectionUtils.isEmpty(persons))
             return Collections.emptySet();
         Set<PersonAccountAttribute> notFound = persons.stream()
                 .filter(person -> !accounts.findAccount(person).isPresent())
                 .collect(toSet());
         if (!notFound.isEmpty())
-            notification.send("{}[{},{}], IM账号不存在列表: {}", operation,
+            this.notification.send("{}[{},{}], IM账号不存在列表: {}", operation,
                     group.getTid(), group.getName(),
                     cn.axzo.framework.jackson.utility.JSON.toJSONString(notFound));
         return notFound;