Does the JDBC Gateway support Oracle 11G RAC?
The JDBC gateway has not been explicitly tested with Oracle 11G RAC.
Any validation against the customers Oracle 11G RAC installation would have to be done by the customer. The JDBC gateway doesn't handle any RAC specific errors, but the gateway can be configured to handle specific errors (defined using a JDBC SQLSTATE error string).
For example, if RAC produces SQLSTATE strings not handled by the gateway, that SQLSTATE can be handled like a connection failure and the connection re-established, which should handle any failover scenarios.