Today I had the idea to build a very simple web application, which would be powered by a REST backend. Since I wanted a very lightweight server I started looking at Jetty. A
Had the very same problem when trying to deploy a jax-rs (with resteasy) to glassfish 3.1.2.2. Tried to resolve what caused the inconsistency, took for hours and couldn't find it in the end - glassfish behavior became more and more strange.
My recommendation for everyone trying to run resteasy on gf: stop it and use jersey.