"VFS was unable to set the URLStreamHandlerFactory. This will have unpredictable results"

When the OSGi subsystem is triggered in AS the following warning shows up. I think it's harmless but it looks worrying and unprofessional.

10:27:50,419 WARN [org.jboss.vfs] (MSC service thread 1-3) VFS was unable to set the URLStreamHandlerFactory. This will have unpredictable results