Watch out for issues due to classloading. Whilst you may not have this problem (if you are lucky) it is one problem that can be quite complex to solve when having to alter an existing application.
Will give you a good overview of the issue. Note that there are different MODES for Websphere that means it works differently for classloading between versions. I think that the Websphere 3.51 version is different to most servers in classloading.
You will get ClassDefNotFound errors in most situations that this problem is seen.
We support 8 J2EE servers with our product and we find that server configuration is the biggest headache when getting the same application working on all the servers.
Slashdot Mirror
J2EE Classloading
Will give you a good overview of the issue. Note that there are different MODES for Websphere that means it works differently for classloading between versions. I think that the Websphere 3.51 version is different to most servers in classloading.
You will get ClassDefNotFound errors in most situations that this problem is seen.
We support 8 J2EE servers with our product and we find that server configuration is the biggest headache when getting the same application working on all the servers.