... After considering Apache Tomcat and Ruby, the group decided on the Sun GlassFish Enterprise Server with its enhancedclustering capabilities, which ensure high availability and scalability for deployment architectures through in-memory...
http://newsreport.open-tech.com/articles/139/3/ja/22202
...Features • Enhanced Web Services Registry • Enhancedclustering and Grid Computing facilities • Enhanced Systems...number of new High Availability Features including enhancedclustering; resource management; dynamic mount point registeration...
http://www.oracle.com/technology/tech/java/oc4j/1013/OracleAS-NF-1013.pdf