Здравствуйте, purser, Вы писали:

P>В чём может быть причина и как побороть?

The wildcard classpath relies on the getResources() method of the underlying classloader. As most application servers nowadays supply their own classloader implementation, the behavior might differ, especially when dealing with jar files. A simple test to check if classpath* works is to use the classloader to load a file from within a jar on the classpath: getClass().getClassLoader().getResources("<someFileInsideTheJar>"). Try this test with files that have the same name but are placed inside two different locations. In case an inappropriate result is returned, check the application server documentation for settings that might affect the classloader behavior.

Вобщем тут все зависи от веблоджиковского класслоадера.
Я бы сто раз подумал а надо ли оно мне такое счастье.