try {
RequestFacade request = RequestFacade.class.cast(event.getHttpServletRequest());
Field coyoteRequest = RequestFacade.class.getDeclaredField("request");
coyoteRequest.setAccessible(true);
Request r = (Request) coyoteRequest.get(request);
r.recycle();
Field mappingData = Request.class.getDeclaredField("mappingData");
mappingData.setAccessible(true);
MappingData m = new MappingData();
m.context = null;