Spring/JTA/JPA DAO integration test doesn't rollback?

Question

My DAO integration tests are failing because entities created during the tests are still in the database at the start of the next test. The exact same behavior is seen from

Answer 1

It turned out that my C3P0 JDBC data source was not XA aware and was therefore not participating in the transaction. Why I did not get an error, nor a warning in the log file, I do not know. Nonetheless, the reason you cannot use an XA aware data source is explained very nicely here. Note that the data source does not need to be XA capable...just XA aware.

Replacing the C3P0 data source with the following one solved the problem.