Hi,

In the version 3.1 a bug HHH-1367 was opened and later fixed.
(https://hibernate.atlassian.net/browse/HHH-1367)

The bug stated that StatefulPersistenceContext class emits a commons-logging warning about narrowing proxy and it was agreed that a better way to suppress this warning is needed.
Following this realization a fix was introduced, which moved this warning to its own category: org.hibernate.engine.StatefulPersistentContext.ProxyWarnLog

In Hibernate 4.2.0 however, the specific category for this warning disappeared again and in order to suppress it you need to suppress the whole StatefulPersistentContext class.

I propose to whoever this concerns to reopen this bug and fix it again.

Thanks