The test version below can now be deployed on wildfly 8, but jersey can not find its root resources. I think there is a problem with the classpath scanning of jersey or with plugin classloader of SCM-Manager.
I've done some more test and i could figure out that jersey is able to find the root resources, if the war file is deployed exploded. Please do the following steps to get a running instance on wildfly 8:
I see the changes are not in current release. This version is quite old. Is it possible to merge it to current version? Unfortunately I have no chance to compile it myself.
But I can't use your workaround as I'm using domain mode (no standalone).
The problem with VFS was fixed in jersey 2.13:
I have no clue how problematic is it for you to upgrade from jersey 1.19 to 2.13 (and higher) as it's major upgrade.