后台做完请求后无法将数据返回给前台

不能返回结果 报了这个错 是什么原因
2015-12-17 23:30:22 [org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdviceChain]-[DEBUG] Invoking ResponseBodyAdvice chain for body={message=添加成功, status=success}
2015-12-17 23:30:22 [org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdviceChain]-[DEBUG] After ResponseBodyAdvice chain body={message=添加成功, status=success}
2015-12-17 23:30:22 [org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver]-[DEBUG] Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> com.panda.controller.BookController.addAnExistingBook(java.lang.Integer,java.lang.String,javax.servlet.http.HttpServletRequest)]: ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error
2015-12-17 23:30:22 [org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver]-[DEBUG] Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> com.panda.controller.BookController.addAnExistingBook(java.lang.Integer,java.lang.String,javax.servlet.http.HttpServletRequest)]: ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error
2015-12-17 23:30:22 [org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver]-[DEBUG] Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> com.panda.controller.BookController.addAnExistingBook(java.lang.Integer,java.lang.String,javax.servlet.http.HttpServletRequest)]: ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error
2015-12-17 23:30:22 [org.springframework.web.servlet.DispatcherServlet]-[DEBUG] Could not complete request
ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error

js

$(".info-form-1 .btn-success").click(function(){

		var $bookId = $(".info-form-1 #bookId").val();

		var $num = $(".info-form-1 #num").val();

		

		var info = {

			bookId:	$bookId,

			num:$num

		};

		

		$.ajax({

			type:"POST",

			url:"../../../pandastore/book/addAnExistingBook.do",

			data:info,

			success:function(json){

				alert(json.status);

				if (json.status == success) {

					// 添加成功

				}

				else {

					// 添加失败

				}

			}

		});

	});

controller:

@RequestMapping("/addAnExistingBook")

	public @ResponseBody Map<String,Object> addAnExistingBook(@RequestParam Integer num,

			@RequestParam String bookId)

	{

		Map<String,Object> map = new HashMap<String,Object>();

		Map<String,Object> paramMap = new HashMap<String,Object>();

		try {

			paramMap.put("bookId", bookId);

			Book book = new Book();

			book = bookservice.selectBookById(bookId);

			if(book == null)

			{

				map.put(Constants.STATUS, Constants.SUCCESS);

				map.put(Constants.MESSAGE, "添加失败,该bookId不存在");	

			}

			else{

				Books books = new Books();

				books.setBookId(bookId);

				books.setIsDelete("0");

				for(int i = 0;i<num;i++)

				{

					if(bookservice.addabook(paramMap))

					{

						books.setRank(bookId+System.currentTimeMillis());

						booksservice.addAnExistingBook(books);

					}

					else

					{

						map.put(Constants.STATUS, Constants.SUCCESS);

						map.put(Constants.MESSAGE, "添加失败");	

					}

				}

				map.put(Constants.STATUS, Constants.SUCCESS);

				map.put(Constants.MESSAGE, "添加成功");

			

			}

			

		} catch (Exception e) {

			map.put(Constants.STATUS, Constants.SUCCESS);

			map.put(Constants.MESSAGE, "添加失败");			

		}

		

		return map;

	}