How do i disable HTTP-Session replication?

[n2]

Hello,
how do i disable HTTP-Session replication in a Linux, Apache, mod_jk, JBoss 4.0.2 environment. I want to have simple fail-over when one server is down. The other server should answer without old session. So user has to login again.
Can you help me?
Daniel.

[ben.wang]

By default it is not turned untill you have distributable tag in the web war.

-Ben