LazyInitializationException: failed to lazily initialize a collection of role: web.entity.Users.boardList, could not initialize proxy - no Sessioncode in controller:result = boardService.getBoardListByUser(user); List<Boards> boardList = new ArrayList<Boards>((List)result.getObject()); model.put("boards",boardList);code in service:@Transactional(readOnly = false) public ResultImpl getBoardListByUser(Users user){ List<Boards> boardList = new ArrayList<Boards>(user.getBoardList()); if(!boardList.isEmpty()){ result.setIsSuccessful(true); result.setObject(boardList); }else{ result.setIsSuccessful(false); } return result; }