[jboss-dev-forums] [Design of Clustering on JBoss] - Removing SFSB in HttpSessionListener

[tkimura@redhat.com]

Suppose we have a web application which uses stateful session beans, and we have HttpSessionListener like this:


  | public void sessionDestroyed(HttpSessionEvent event) {
  |     event.getSession().getAttribute("sfsb").remove(); // Make sure to call SFSB's @Remove method
  | }
  | 

This behavior is what Seam does.

The HttpSessionListener.sessionDestroyed() would be called in session invalidation, session timeout and during redeploy/shutdown for cleaning up local resources. This happens in both cases, clustered and non-clustered .

However, in clustered environment, the sfsb.remove() method call in HttpSessionListener becomes a cluster-wide operation. So when we shutdown one node, HttpSession is still available on the other node for fail over but SFSB is missing.

I don't think the application is doing something wrong. Possible solution is to separate the node from cluster before applications undeploy. This makes the sfsb.remove() method call local-only.

Thoughts?

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