A method, system and computer program is provided for enabling varying computer applications that are running in Enterprise Information System to send request to a cluster of Java Enterprise Server (J2EE server) cluster. One or more computers provide an application server environment including one or more servers operating within the application server environment to run an application. The computers create a cluster of resource adapters and create a cluster thread for each of the resource adapters to read a cluster port from configured properties, wherein the cluster thread for each of the resource adapters enables an enterprise information system to participate in a cluster of J2EE runtime servers.