I am very new to Jboss A/S and clustering; I have read complete clustering jboss document before jumping to the configuration. I am little stuck with HA-JNDI part.. I have done the following things in Jboss 4.2 A/S: 1) Created a stateful bean that simply computes a sum (used @Clustered) 2) Added a stand along java application, client, outside the A/S and successfully invoked the bean in a loop. 3) I successfully created a cluster of two nodes 4) While the client is getting responses from A/S, I killed it and thought I would still get the responses as the second node takes over. But, the client died. I have just used @clustered annotation for bean and nothing more than that. I have used the following jndi properties in the client to invoke the bean: props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory"); props.put("java.naming.provider.url", "jnp://localhost:1099"); props.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces"); I have even used 1100 but i n vain. After going through wiki and forum, I understand that may be I did not registere the beans in the HA-JNDI service. Shoud I register the bean to the HA-JNDI service. If so, how to register to bean using HA-JNDI in 4.2 app server? If we need not to register the bean in the HA-JNDI service, is clustering not working because I am using client outside the A/S? I would really appreciate if you can direct me a way as this is very important for me to proceed further. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4066783#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...