Why are transactions not rolling back when using SpringJUnit4ClassRunner/MySQL/Spring/Hibernate

Question

I am doing unit testing and I expect that all data committed to the MySQL database will be rolled back... but this isn\'t the case. The data is being committed, even though my

Answer 1

The problem turned out to be that the connection was auto-committing BEFORE the transaction could be rolled back. I had to change my dataSource bean to include a defaultAutoCommit property: