Application Server can be configured for failover. Use Chapter 1, Sun Cluster HA for Sun Java System Application Server EE (Supporting HADB Versions as of 4.4), in Sun Cluster Data Service for Sun Java System Application Server EE (HADB) Guide for Solaris OS as a guide to installation and configuration.
To install the necessary packages, run the Java ES installer on each node, installing Application Serverand the HA Sun Java System Application Server(PE/SE) subcomponent of the Sun Cluster Agents for Sun Java System components. Select the Configure Later option.
When specifying installation directories, use the location on the node's local file system for Application Server, and use locations on the cluster file system for AS Configuration and Product Location.