case HttpServletResponse.SC_NOT_IMPLEMENTED: // 501
case HttpServletResponse.SC_SERVICE_UNAVAILABLE: // 503
case HttpServletResponse.SC_HTTP_VERSION_NOT_SUPPORTED: // 505
case HttpServletResponse.SC_NOT_IMPLEMENTED: // 501
case HttpServletResponse.SC_SERVICE_UNAVAILABLE: // 503
case HttpServletResponse.SC_HTTP_VERSION_NOT_SUPPORTED: // 505