Help- Attribute is null in request header during authorization

[Peter Schober]

* Milan Ashara <milan.ashara at spec-india.com> [2012-10-03 16:40]:
> After IDP Authenticate user, it redirects to URL. where I have used
> filter in java to authorize user. I am not getting any attribute
> header / cookie (UID is null)  from which I authorize user.

Don't keep others guessing when you want them to solve your problem.

What does "redirects to URL" and "I have used filter in java" mean,
exactly? Who/what is doing the redirect? Shibboleth or your own code?
Did you set up the Shibboleth SP in front of your Java Servlet
container, as described in the documentation? Using mod_proxy_ajp?
Are the attributes there in the Shibboleth SP (transaction.log)?
-peter