docs: public void doFilter(ServletRequest request, ServletResponse response,
                           FilterChain chain) throws IOException, ServletException {
          InstanceInfo myInfo = ApplicationInfoManager.getInstance().getInfo();
          InstanceStatus status = myInfo.getStatus();
          if (status != InstanceStatus.UP && response instanceof HttpServletResponse) {
              HttpServletResponse httpRespone = (HttpServletResponse) response;
              httpRespone.sendError(SC_TEMPORARY_REDIRECT,
                      "Current node is currently not ready to serve requests -- current status: "
                              + status + " - try another DS node: ");
          }
          chain.doFilter(request, response);
      }