Does anyone know if there is a bug is Sun App server 8.1 that causes the following issue. I have an EAR file that contains a jar file with a MDB. Within the MDB jar I have included the required library jars (for hibernate etc). When I deploy I my code cannot find the hibernate jar files. and when I look at the folder when my ear is located in the server I see that the library jar files are also exploded which over rights my manifest. I can deploy the same EAR on Sun server 9.0 and everything works fine, on Sun server 8.2 it works fine once I modify the security policy. But I have no luck on Sun server 8.1 even why I set the appropriate security policy.