This normally occurs when some error occurred previously. Check that you did not catch an exception earlier. You can also enable logging in EclipseLink, and all exceptions that occur within EclipseLink should be logged.
What application server are you using?
Ensure that you are using the Oracle9Platform and Oracle JDBC driver.
Leon Derks-2 wrote:
When I add the <property name="eclipselink.jdbc.batch-writing"
value="Oracle-JDBC" /> to my persistence.xml
I get the following error when the transaction tries to commit:
javax.persistence.RollbackException: Transaction rolled back because
transaction was set to RollbackOnly.
Can anyone tell me why this exception is thrown?
thanks,
Leon
