Available now, Oracle GlassFish Server 3.1 is based on its open source counterpart, the GlassFish Server Open Source Edition. Version 3.1 focuses on high-availability features such as load balancing, failover, state management and centralized administration.

"With this release, Oracle is delivering on the roadmap we announced at and responding to the increasing demand for Oracle GlassFish Server by adding new features for enterprise management and high availability to help customers reduce application and deployment complexity and increase developer productivity and system uptime," said Oracle's Steven Harris, senior vice president for application server development, in a statement released by the company.

Other capabilities include improvements for OSGi support, including JDBC, HTTP Service, and Apache Felix 3.0.8  backing. Felix is an OSGi service platform. OSGi offers modularity for Java. Version 3.1 also offers faster startup and deployment as well as integration with the NetBeans and Eclipse IDEs.

GlassFish MQ capabilities in version 3.1 enable high-availability messaging. Version 3.1 also improves manageability by supporting as many as 100 instances in a single domain. Remote node management is enabled via integration with the SSH (Secure Shell) network protocol. Oracle Coherence is supported for in-memory session state replication.