We released the second candidate release of Hibernate ORM 5.4.0.
We have fixed a few issues and improved the documentation a bit.
Please consider testing this candidate release so the upgrade can be as smooth as possible.
We eventually decided to upgrade JAXB to 2.3.1 because the JAXB 2.2 pom files are invalid and cause problems in certain situations.
Our OSGi tests (which were the reason we kept JAXB 2.2 for CR1) are still using 2.2, which is the version included in Karaf, but the rest of ORM uses 2.3.1.
All details are available and up to date on the dedicated page on hibernate.org.
We will release 5.4.0.Final in the coming weeks and will release regular maintenance releases thereafter.