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Install the attached applications to the appropriate cluster member assuring that you use the correct deployment plan for each member. Note that the deployment plan must be updated with the hostname (or IP address) for each machine. The appropriate spots are identified in the plans with xx.yy.zz.aa.

Tip: Memory to memory replication currently requires that all cluster members must reside on the same physical subnet since multicast broadcast is used.

Once you get the applications installed on each cluster member, you can test httpsession replication by hitting the application with your favorite browser. Probably something like: http://localhost:8080/servlets-examples-cluster/servlet/SessionExample . Note that the output page contains the ID of the server that is servicing the request. In your browser window, fill in the appropriate input fields and hit the submit button. The console dialogue (the prompt where you started geronimo) should show that that httpsession data is being transmitted and received between the cluster members. Note that the transmit/receive confirmation messages in the log are only present for Tomcat 5.5.12.

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Tips
When testing using a web browser, make sure that you erase cookies and cached pages between test cases. Browser caching can cause confusion when testing.
Make sure your application has the distributable attribute defined in web.xml
Memory to memory replication currently requires that all cluster members must reside on the same physical subnet since multicast broadcast is used. Make sure all cluster members are on the same physical subnet and that multicast broadcast is supported on the subnet.

Also, see http://tomcat.apache.org/tomcat-5.0-doc/cluster-howto.html for more information on tomcat clustering.

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