The resteasy-2-0-request-matching attribute in the jaxrs does not enable or disable anything in RESTEasy. It looks like this setting was brought into RESTEasy 3.x with RESTEASY-1951. However, it was never ported into the 4.x branch which is what RESTEasy 6.2 is based on. The basic idea seems to be that a request to a resource can match regardless of the HTTP Method. In other words, if the method is annotated with @GET, a POST request would also match the resource. This seems to have been changed in JAX-RS 2.1.

We should deprecate this and likely log a message if it's been set in the subsystem.