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Hibernate ORM 4.2.0.CR1 Released

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Hibernate ORM 4.2.0.CR1 was just released. The full changelog can be viewed here: https://hibernate.onjira.com/issues/?jql=project=10031+AND+fixVersion=12651

This release included a few notable bug fixes and improvements:

  • HHH-465: nulls first and nulls last syntax in HQL ordering
  • HHH-1917: automatically delete orphaned JoinTable rows on a bulk delete affecting a Many-To-Many association
  • HHH-2448: deterministic column aliases, regardless of mapping ordering -- mainly affects clustering environments
  • HHH-7797: the logic handling unique columns and constraints was entirely re-written and improved

In addition, a handful of performance improvements went in. So far, we have seen dramatic improvements in JBoss benchmarking.

  • HHH-7746: additional batch loading algorithms (use "hibernate.batch_fetch_style" in your settings -- see the new Enum for choices)
  • HHH-7872: improves L2 caching of reference data (enable with "hibernate.cache.use_reference_entries")
  • HHH-7902: Originally, JDBC types (Connection, Statement, ResultSet, etc.) were wrapped with Java Proxies to introduce resource management, logging, etc. The proxying was shown to be a performance hotspot, so they were entirely removed. The functionality was replaced with a new set of internal contracts/helpers.

As usual, thank you to the community for all the support and hard work!

JBoss Nexus: https://repository.jboss.org/nexus/content/groups/public/org/hibernate

Maven Central: http://repo1.maven.org/maven2/org/hibernate/hibernate-core (should update in a couple of days)

SourceForge: https://sourceforge.net/projects/hibernate/files/hibernate4

Downloads: ZIP or TGZ

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