Our team is trying to configure a connection to an Oracle 11g RAC database using Fast-Connect-Failover.

1st question: We are currently configured to use JPA: EntityManagerFactory, PersistenceAnnotationBeanPostProcessor. In the Spring Data page under Relational Databases, I see that "JDBC Extensions" and "JPA" are separate. Is there a problem trying to use both?

2nd question: Our DBA's have configured an Oracle RAC Service so that our connection URL does not call out the individual nodes. e.g.:
Code:
url=jdbc:oracle:thin:@dbrac11gdev-scan:1522/CAS11DEV_SRV.qualcomm.com
That works fine for the connection url; however, we are unsure as to how to set ONS-configuration. Should it refer to the -scan service or do we need to determine the individual nodes? e.g.:
Code:
ONS-configuration="dbrac11gdev-scan:6150"