Re: Classcast Exception using GAE/J+Spring+JPA+MySQL

I also face the same problem:
java.lang.ClassCastException: org.datanucleus.store.rdbms.RDBMSManager
cannot be cast to org.datanucleus.store.appengine.DatastoreManager
at
org.datanucleus.store.appengine.jpa.DatastoreEntityManager.<init>(DatastoreEntityManager.java:
38)
at
org.datanucleus.store.appengine.jpa.DatastoreEntityManagerFactory.newEntityManager(DatastoreEntityManagerFactory.java:
102)
at
org.datanucleus.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:
407)