Dear Application Server Vendor:TM TM
By writing for an application server that is not branded J2EE compatible, I could be writing to a proprietary implementation, thereby locking my application and my code into a vendor-specific, nonstandard implementation. When my business needs change and I need a different application server, the development team will have to spend additional time and resources to modify what they have already written. This means substantial additional costs and is too high a price to pay.
Portability is important to me and the reason for my purchase of a J2EE application server. Your implementation of the J2EE specification, however, has not been tested in accordance with the Compatibility Test Suite and therefore cannot provide the assurance that the J2EE compatible logo delivers of lowering development costs by eliminating vendor lock.
There is great industry support for J2EE compatibility, as evidenced by the number of vendors listed on http://www.oracle.com/technetwork/java/javaee/compatibility-1-138385.html. If you do not become compatible, I will evaluate application servers from that list.
Therefore, I urge you to run the comprehensive test suite that Oracle provides to help ensure that applications that run on one vendor's J2EE technology branded configuration will also run on another.