In org.jboss.ws.common.utils.AbstractWSDLFilePublisher, the condition used to detect external import looks like this:
// its an external import, don't publish locally
if (locationURI.startsWith("http://") == false)

This does not take in account import done over other protocols such as HTTPS. Deploying such WSDL will fail since jboss will try to resolve an absolute URL against the current deployment unit.

Simply adapting the test to include "https://" seems effective (not sure if it truly satisfies all use cases however).

This was only tested in version 2.2.3 Final of jboss-ws-common but those lines are still in trunk...