code: protected void attention(HttpServletRequest request, HttpServletResponse response) {
          final StringBuilder sb = new StringBuilder();
          sb.append("{FAILURE}: ").append(getTitlePath(request));
          sb.append(LF);
          sb.append(" *Read the exception message!");
          sb.append(LF);
          logger.debug(sb.toString()); // to notice to developer
      }
docs: --------