So your subject was just incorrect then? You really mean to say that for JdbcResourceLocalTransactionCoordinatorImpl, exceptions in callbacks ought to force a rollback? If so, say what you mean rather than getting upset when people question you.

Ensuring JdbcResourceLocalTransactionCoordinatorImpl rolls back on an exception from callbacks is fine (again not what your subject asks for). Rolling back a JdbcResourceLocalTransactionCoordinatorImpl anytime a failure happens is not.