[keycloak-user] WFLYRS0015: No Servlet declaration found for JAX-RS application

Hi, I'm currently investigating upgrading from version 3.3.0 to 3.4.2 (as a part of in the end upgrading to the latest 4.5 version). When I boot up version 3.4.2 on out test server I see the following warning in the log: WARN [org.jboss.as.jaxrs] (MSC service thread 1-7) WFLYRS0015: No Servlet declaration found for JAX-RS application. In custom-rest-endpoing-1.7.war either provide a class that extends javax.ws.rs.core.Application or declare a servlet class in web.xml. The custom-rest-endpoing.war is a realm-restapi-extension that we deploy to our Keycloak instance. Indeed we haven't subclassed javax.ws.rs.core.Application nor have we any web.xml. However, looking at the rest provider example ( https://github.com/keycloak/keycloak/tree/master/examples/providers/rest) I can't find anything about that there either. Is this warning anything I need to pay attention to? Cheers, Ulrik