I am facing a strange behaviour on my Production application server. I am having two Jboss (jboss 4.3.0) application servers which is loadbalanced by apache Mod_jk. i have an application A, which will have few other application links in its home page and all are running on the same box. Here am using Single signon for login. My problem is after i logged in to the application A, i am able to see the other application links in its home page, the problem is starting when i click on the links on the home page, it suddenly get me a message as "Session Expired and Relogin" this is happening in few secs. After i noticed one thing that the application A's requests are going to the first app server node and the application links (on homepage) requests are going to app server node 2. Here all are sharing the same jsession id. when the requests of homepage applications going to the second node with the same jsession id, it is becoming Null since the second node is not having that session id (may not be replicated) and throws session expired message. It would be great if some one give me some suggestion this to solve my problem. Thanks in advance.