SpringMvc请求接口出现诡异的Connection tim

更新完项目之后，测试某些新增的接口发现出错，会进入全局捕捉的异常类里面，错误竟然是Connection timed out。
全局捕捉异常的类如下：

@ControllerAdvice
public class DefaultExceptionHandler {
   private final Logger logger = LoggerFactory.getLogger(this.getClass());
   @ExceptionHandler
   public ModelAndView processException(HttpServletRequest request, HttpServletResponse response, Exception e) {
       ModelAndView mv = new ModelAndView();
       logger.error(e.getMessage());
       BaseResult baseResult = new BaseResult("500", "服务器端异常");
       mv = new ModelAndView(new MappingJackson2JsonView());
       mv.addObject("code", baseResult.getCode());
       mv.addObject("message", baseResult.getMessage());
       mv.addObject("requestId", baseResult.getRequestId());
       return mv;
   }
}

错误如下：

22:43:37 [http-nio-8020-exec-5] INFO  o.a.c.httpclient.HttpMethodDirector - I/O exception (java.net.ConnectException) caught when processing request: Connection timed out
22:43:37 [http-nio-8020-exec-5] INFO  o.a.c.httpclient.HttpMethodDirector - Retrying request

经发现，是因为mapper文件没有更新。。。