Connect to MySQL Fabric using JPA + Hibernate (no replies)

I hope I did not post to the wrong forum.

I am trying to connect to MySQL Fabric using JPA and Hibernate. However, my application can somehow only able to read the data from Fabric.
I can write the data through plain JDBC direct connection, but not through JPA and Hibernate.
I would like to know if there is any special settings for it?

e.g. some changes in the persistence.xml or others.

Any ideas and helps are welcome.

Thank you.