AbstractJaxrsService throws NPE when request content bean not found

HippoBean bean = (HippoBean) getObjectConverter(requestContext).getObject(requestContext.getSession(), requestContentPath);

requestContext.setAttribute(JAXRSService.REQUEST_CONTENT_BEAN_KEY, bean);
requestContext.setAttribute(JAXRSService.REQUEST_CONTENT_NODE_KEY, bean.getNode());

The last line throws NPE when the expected content in the path doesn't exist. This causes 500 error where 404 needed.