Can anyone tell me the advantages and disadvantages between Tomcat, JRun, and JServ for Apache Web Server?
|Apache JServ||Free as in both beer and speech||
Realistically, the support issues with Tomcat and JServ aren't really a problem. If you write good code, you'll never trip up these servers.
My choice would be Tomcat, since it's an Open Source project (making it free and giving you access to the source code if necessary), stays on top of the servlet API developments, and works very well (I've never had any problems).
I would personally stay away from JRun for the counterpoint reasons listed above, but have no technical reasons to poo-poo JRun. Allaire has good products, and I've heard that JRun 3.0 and above is a lot easier to work with in terms of configuration, etc.
Hope that helps,