update

mec-biz/src/main/java/com/ym/mec/biz/service/impl/PracticeGroupServiceImpl.java

@@ -3747,6 +3747,9 @@ public class PracticeGroupServiceImpl extends BaseServiceImpl<Long, PracticeGrou
     @Override
     public void practiceGroupRenewRemind() {
         List<Integer> needRemindStudentIds = practiceGroupDao.getNeedRemindPracticeUsers();
+        if(CollectionUtils.isEmpty(needRemindStudentIds)){
+            return;
+        }
         List<Map<Integer, String>> userNeedRemindPracticeIdMaps = practiceGroupDao.getUserNeedRemindPracticeIdMap(needRemindStudentIds);
         if (!CollectionUtils.isEmpty(userNeedRemindPracticeIdMaps)) {
             Map<Integer, String> userNeedRemindPracticeIdMap = MapUtil.convertIntegerMap(userNeedRemindPracticeIdMaps);