When entityManager.getReference() method is invoked, the transaction interceptor (@Transactional) is executed and the commit is done but at this moment without involving any connection to the database.
After that, when a proxy fires a load event, it opens a connection and performs the query, but the close() method is never invoked causing the connection to remain active in the pool and never be released.
I have based my sample on projects of Hibernate repo. Following the example of hibernate-demo ([cdi-jpa-testing|https://github.com/hibernate/hibernate-demos/tree/master/other/cdi-jpa-testing]) I made a sample project with Hibernate 5.4.2/5.4.3 using CDI and Spring Data JPA Agroal ( that uses Spring AOP Proxies) [test|https://github.com/arielcarrera/hibernate-agroal-test] ) .
After running into connection leaks with "Arjuna TransactionalDriver", I tried with "hibernate-agroal" but using a custom AgroalConnectionProvider (enabling transaction integration) with same result.
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