Sun GlassFish Enterprise Server v2.1.1 High Availability Administration Guide


When a session fails over, any references to open files or network connections are lost. Applications must be coded with this restriction in mind.

You can only bind certain objects to distributed sessions that support failover. Contrary to the Servlet 2.4 specification, Sun GlassFish Enterprise Server does not throw an IllegalArgumentException if an object type not supported for failover is bound into a distributed session.

You can bind the following objects into a distributed session that supports failover:

You cannot bind the following object types into sessions that support failover:

In general, for these objects, failover will not work. However, failover might work in some cases, if for example the object is serializable.