better user load

[mark smith]

hi

we have an jsp/servlet application who work fine with some concurent user.... and a couple of month, the application will need to support 50 000 user in 10 minutes

now we use tomcat.... if we continue with it, we will need to buy a lot of server....

we begin to check another product to handle this load.
somebody have experience with jonas and jboss with many concurent user?

thanks