I have developers connecting to my RAC database with jdbc. I want them to use nodes 3 and 4. I have a TAF tnsnames set up for them as follows: This is the tnsnames on the server. However, JDBC does not use tnsnames. How do I get them to take advantage of this ? I can use this locally on my RAC boxes. so what do I do with jdbc guys? JAVAGUYS = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = node3-vip)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = node4-vip)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = JAVAGUYS) ) )