In WebLogic 9.2 a new feature called Filtering Classloader (documented in the WebLogic server documentation) has been implemented. This feature should be used to get XFire running on WebLogic 9.2+. This requires one to package the application as an EAR file (Enterprise Application Archive).
What needs to be done is to put the following statement into weblogic-application.xml:
Resulting in a weblogic-application.xml that will look somewhat like the following:
This fixes the problem, as you are now using a Filtering Classloader, which is set up to load everything from the System Classloader, but the JSR-181 packages, as they should be loaded from the Application Classloader (the javax.jws.* packages).
You can control everything else the same way (XML Parsers etc. if you like).
This has been validated on both WebLogic 9.2 and 9.2.1.