Major Description
Section 9.7 of the JPA 2.1 specification defines properties that should be supported by the JPA provider. One of them is javax.persistence.dataSource
The Aries EntityManagerFactoryBuilder implementation provides help for Persistence Providers, but does not pay attention to this property. It should be used to provide the non-jta datasource in the Persistence Unit info if no other non jta DataSource is provided.