Details on what you mean the statement below would be helpful. Especially, the "WITHOUT SSO" part.
i have tried integrating jforum with my webapp without SSO mech.
FWIW, this classCastException can occur if the URL contains duplicate parameters. E.g. ?x=2&x=3, which is valid in HTML (radio buttons use this). The URL parser converts them to from a single
string value to an ArrayList... but if the code expect a single value then you get this error.
It might also be related to a bug in the code that causes this if the *.page URL is not a valid. See:
http://www.jforum.net/posts/preList/4885/19661.page
[originally posted on jforum.net by monroe]