Problem: When you shut down the primary server in a cluster environment, you see many QueueNotReadyException, Connection Failed and org.omg.CORBA.COMM_FAILURE WARN or ERROR messages in server log files on secondary nodes.
Explanation: These errors are caused by switching of the primary server in the cluster, and are expected messages. In general, switching completes in one minute. After one of the secondary nodes becomes the primary node, no such messages are output in log files in the nodes.