EJB programming & troubleshooting: how about portal liferay?
did you use open source protal liferay?what is your feeling?
With my experience with Liferay. I would say it's the best available open-source portal out there right now built using J2EE. JetSpeed from Apache was ok, but it lacked built-in portlets. Jahia looks very good, but it isn't exactly open source.