update

edu-im/edu-im-server/src/main/java/com/keao/edu/im/service/Impl/RoomServiceImpl.java

@@ -75,7 +75,7 @@ public class RoomServiceImpl implements RoomService {
         return baseResponse;
     }
 
-    @Transactional(rollbackFor = Exception.class, isolation = Isolation.READ_COMMITTED)
+    @Transactional(rollbackFor = Exception.class, isolation = Isolation.SERIALIZABLE)
     public void joinRoomSuccess(Long registrationId,String roomId,String userId) throws Exception {
         StudentExamResultApiDto examResult = null;
         log.info("joinRoomSuccess: roomId={}, isAudience={}, isDisableCamera={},isMusicMode={}", roomId);
@@ -167,6 +167,7 @@ public class RoomServiceImpl implements RoomService {
     }
 
     @Override
+    @Transactional(rollbackFor = Exception.class, isolation = Isolation.SERIALIZABLE)
     public BaseResponse joinRoom(Long registrationId, String roomId){
         StudentExamResultApiDto examResult = null;
         log.info("joinRoom: roomId={}, registrationId={}", roomId,registrationId);
@@ -283,7 +284,7 @@ public class RoomServiceImpl implements RoomService {
         roomMemberDao.save(roomMember);
     }
 
-    @Transactional(rollbackFor = Exception.class, isolation = Isolation.READ_COMMITTED)
+    @Transactional(rollbackFor = Exception.class, isolation = Isolation.SERIALIZABLE)
     public void leaveRoomSuccess(Long registrationId,String roomId,String userId) throws Exception {
         if(registrationId != null){
             StudentExamResultApiDto examResult = eduUserFeignService.getExamResult(registrationId);