This is the same situation that exists without the vfs for exploded vs packed jars. The only difference without the vfs is that the url prefix is probably jar: for packed, file: for exploded. There is no generic solution I can see, but this interaction between ejb3 and hibernate is part of the javax.persistence.spi.PersistenceUnitInfo where there is a contract defined to either return a file: url, or an InputStream to the jar. Its the PersistenceUnitInfo implementation that needs to be vfs aware, not hibernate. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4153947#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...