HibernateTransactionManager(Spring) with multiple Session Factories

TransactionStatus status = transactionManager.getTransaction(def);
try{
    doHibernateStuff1();  //Does Hibernate stuff with session
                          //factory related to Tx Manager
    doHibernateStuff2();  //Does Hibernate stuff with session
                          //factory not related to Tx Manager
}
catch(DataAccessException){
 transactionManager.rollback(status);
}
transactionManager.commit(status); //Exception happens here.