23.3. Stateless Session Bean in EJB 2.x

To make an EJB 2.x bean clustered, you need to modify its jboss.xml descriptor to contain a <clustered> tag. 
<jboss>
  <enterprise-beans>
    <session>
      <ejb-name>nextgen.StatelessSession</ejb-name>
      <jndi-name>nextgen.StatelessSession</jndi-name>
      <clustered>true</clustered>
      <cluster-config>
        <partition-name>DefaultPartition</partition-name>
        <home-load-balance-policy>org.jboss.ha.framework.interfaces.RoundRobin</home-load-balance-policy>
        <bean-load-balance-policy>org.jboss.ha.framework.interfaces.RoundRobin</bean-load-balance-policy>
      </cluster-config>
    </session>
  </enterprise-beans>
</jboss>
  • partition-name specifies the name of the cluster the bean participates in. The default value is DefaultPartition. The default partition name can also be set system-wide using the jboss.partition.name system property.
  • home-load-balance-policy indicates the class to be used by the home stub to balance calls made on the nodes of the cluster. By default, the proxy will load-balance calls in a RoundRobin fashion.
  • bean-load-balance-policy Indicates the class to be used by the bean stub to balance calls made on the nodes of the cluster. By default, the proxy will load-balance calls in a RoundRobin fashion.