I am currently using jboss 3.2.6 and I am thinking of changeing to 4.0.
Before I do that I wonder if there are any performance or stability changes between jboss 3.2.6 and jboss 4.0?
As I have understood it 4.0 is very much newly written code. New code tends to be not so very optimized and stable in the beginning.
4.0 is not a complete rewrite as the major version number might suggest. The primary purpose of 4.0 was J2EE 1.4 certification. The latest version of 4.0 is quite stable today. Performance is generally better and with JDK 1.5 it can be significantly better.