Originally posted by ali tareq: ....but what is (King)best one to choose for a big application .............
No king or kong in App server market. JBOSS is a popular, free application server. WebLogic is a properietary server, also very popluar. Websphere has a rich user IDE, also very popular and proprietary. Sun App server is a RI of j2ee spec and avail for free download. But, not that much popular. For more, Pl find the 'Products' column in this forum and discuss with the people. [ April 08, 2006: Message edited by: Mani vannan ]
Originally posted by kri shan: Jboss exactly follows J2EE spec.
No it doesn't. At least "exactly" following the spec. is impossible when the spec. is open to interpretation. JBoss is generally kinder on less pedantically "correct" J2EE applications than WebSphere for example. Build an application using JBoss then try to deploy it to WebSphere - things never go as smoothly as Sun would have us believe they should.
Here is a reasonable summary of the available application server options. Which one is "best" I don't think anyone can say.