Hi everybody, I write to this mailing list because I reported ARIES-1783 <https://issues.apache.org/jira/browse/ARIES-1783> and also tried to investigate why the exception occurs.
Both in our productive environment as well as in the integration tests (for which I created a test in my pull request <https://github.com/apache/aries-jpa/pull/2>) I came to the same conclusion: In the subject case the exception occurs, because the join status of the transaction is NOT_JOINED. I discovered it by looking at TransactionCoordinatorImpl#isTransactionInProgress() <https://github.com/CodingFabian/hibernate-core/blob/03ecaba4b035dd8f4ad1b506dd8ebd73ff3d77f8/hibernate-core/src/main/java/org/hibernate/engine/transaction/internal/TransactionCoordinatorImpl.java#L160>, which returns false. What seems to help is to call joinTransaction() on the EntityManager in the beginning of a method annotated with REQUIRES_NEW. However I can't tell if that would be a proper fix. It feels at least not as proper solution. I would appreciate any support on that issue. Kind Regards Daniel
