The following public constructor exists in previous versions and in javadocs for 4.2:

• org.hibernate.cache.spi.entry.ReferenceCacheEntryImpl.(java.lang.Object,java.lang.String)

It seems like since 4.2.15 it's signature has been changed to:

• org.hibernate.cache.spi.entry.ReferenceCacheEntryImpl.(java.lang.Object,org.hibernate.persister.entity.EntityPersister)

Thus after 4.2.14 -> 4.2.15 upgrade this issue may cause errors.