With multiple data sources, when the first data source to be loaded has a Java 1.7-compatible driver, the SchemaNameResolverJava17Delegate is chosen and cached. If another data source has a driver is not Java 1.7-compatible, the cached resolver is still used, and fails with an AbstractMethodError.

There is a workaround to set hibernate.schema_name_resolver to SchemaNameResolverFallbackDelegate.