You want to configure the max pool size value for the callback client invoker on the server side. The configuration map you pass to the server side Connector will get passed to the server invoker, which will pass it to the callback client invoker when you add a callback listener. In other words, you want to put a value for MAX_POOL_SIZE_FLAG in the configuration map for the server side Connector. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026980#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...