In case of any failure that is occurring in the stub then the stub doesn’t have any information and it faces the difficulty to connect it to the web-logic servers also. The stub remains in connection with the server instances and allow it to be started during the booting of the system. The stub consists of the server instances list as well that allow the server to communicate with one another. If there are no servers that in communication then the stub uses DNS to find the running server and obtain the list of running instances of the server. The stub refreshes itself to obtain the list and take advantage of the new server that is attached to the cluster.