java.lang.NoSuchMethodError：使用jpa / hibernate时javax.persistence.EntityManager.createQuery

Question

We are running an app in jboss 5.1.0.GA, and it's complaining when we try to use the EntityManager.createQuery method. An implementation of this method is available in org.hibernate.ejb.AbstractEntityManagerImpl (and probably a few other places included in our code).

I suspect that it's picking up an older version of hibernate from the jboss libs directory.

How can I fix this?

Code looks something like this:

 List<UserGroup> userGroups= DbHelper.getNonNullEntityManager().createQuery("SELECT ug FROM UserGroup ug", UserGroup.class).getResultList();

Exception is this:

java.lang.NoSuchMethodError: javax.persistence.EntityManager.createQuery(Ljava/lang/String;Ljava/lang/Class;)Ljavax/persistence/TypedQuery;

Answer 1

Ok I fixed it by removing the Class parameter from the method. Seems that was added in a later method of hibernate:

List<UserGroup> userGroups= DbHelper.getNonNullEntityManager().createQuery("SELECT ug FROM UserGroup ug").getResultList();