The capability 'org.wildfly.extension.undertow.handler.file' should not contain '.file' as it is also used for reverse proxy. ----------------------------------------------------------------------------------------------------------------------------- Key: WFLY-5800 URL: https://issues.jboss.org/browse/WFLY-5800 Project: WildFly Issue Type: Bug Components: Web (Undertow) Reporter: Darran Lofthouse Assignee: Darran Lofthouse Priority: Blocker Labels: affects_elytron Fix For: 10.0.0.Final A very minor issue but raising as blocker as once capability names reach releases they are a part of the API and inherit all other backwards compatibility requirements.