There are no specific problems with the Hibernate core version 4.1.8 and 4.2.16 (both version I've tried out).
But with the newest versions (4.3.6 and 4.3.7, other 4.3.x versions not tested) the hibernate core except allways with this exception:
"org.hibernate.HibernateException: No TransactionManagerLookup specified".
I tried several different configuration in the hibernate.cfg.xml with no result, allways the same problem.
In the attachments:
hibernate.cfg.xml -> the actual hibernate configuration (workin under 4.2.16)
HibernateException -> Exception with Stacktrace
Exception.txt -> the log begin with weblogicserver start until hibernate exception.