90 Migrating Applications from WebLogic, JBoss and Tomcat to WebSphere V6
5.1 J2EE application server compability
Although the J2EE specification covers an increasingly wider spectrum of
enterprise applications development, there is still the need for vendor-specific
features.
If the vendor-specific features are used without proper planning, they will cause
migration problems. Small differences and/or bugs in the vendor’s
implementation of the J2EE specification might also cause compatibility
problems. We summarize these issues in the following sections:
Differences in J2EE implementations
Using vendor-specific features
Class loader related problems
Deployment descriptors
5.1.1 Differences in J2EE implementations
This section describes some ...