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9. Clustering in Tomcat 7 > Testing of the clustered instance
To perform cluster testing, we are going to take you through a sequence of events. In the following event, we only plan to use two Tomcat instances—tomcatnode1 and tomcatnode2. We will cover the following sequence of events:
- Start
tomcatnode1. - Start
tomcatnode2(wait for node 1 to start completely). - Node 1 crashes.
- Node 2 takes over the user session of node 1 to node 2.
- Start node 1 (wait for node 1 to start completely).
- Node 2 and node 1 are in running state.
Now we have a good scenario with us, we will walk through how the entire process works:
- Start instance 1:
tomcatnode1starts up using the standard startup sequence. When the host object is created, a cluster object is associated with it. Tomcat asks the cluster class (in this caseSimpleTcpCluster)to create a manager for the cluster and the cluster class will start up a membership service.
