Hi Tuomas Kiviaho,

I'm not very familiar with OSGI environments, but from what I can understand from your description, the loadCtClassFromClass() method should always be used and never direct calls to classPool.get(...)

I prepared such a fix that I would like you to test — see my topic branch https://github.com/barreiro/hibernate-orm/tree/HHH-10245

Please let me know if it fixes the issue.