I got the following situation.
I'm using Apache Felix as OSGi Service implementation and Apache Karaf as OSGi container.
There is a bundle in karaf which should save some data via hibernate into a database, but I always get a SQLException: No Suitable Driver found.
I deployed the mysql-connector-bundle to karaf.
The problem is, in my mind, that hibernate whether imports the mysql-driver-packages nor my classes which should be mapped.
But I don't know hot to fix this. I'm familar to eclipse rcp where the buddy-policy fixes such problems, is there any best practice for this problem for felix and karaf?
What version of hibernate do you use? Only since Hibernate 4, hibernate is aware of OSGi classloaders, and it still doesn't have complete OSGi support. See e.g. https://hibernate.onjira.com/browse/HHH-7527, which is planned for Hibernate 4.2.
We used Gemini JPA with eclipselink instead as JPA provider in OSGi.
In the karaf eco-system, there is Aries JPA, which is primarly used with OpenJPA. See Which JPA providers are supported by Apache Aries Managed JPA?