EJB + ADF app

Question

Hi.
I'm using JDeveloper 11.1.2.2.0 and I'm developing "normal" adf application. Inside this application there is also project named Interface which uses EJB3 tchnology to communicate with outer world and outer world can communicate with my app.
If I call one method of my stateless session bean for first time (after deployment/restart of server) it works fine. Next time I want to execute that method I get error like:
Exception [EclipseLink-7197] (Eclipse Persistence Services - 2.1.3.v20110304-r9073): org.eclipse.persistence.exceptions.ValidationException Exception Description: Null or zero primary key encountered in unit of work clone [my.entity], primary key [null]. Set descriptors IdValidation or the "eclipselink.id-validation" property.This happens when I do particualar query (which is ok, for sure).
If I just restart server and reexecute same method and works fine.
For me it looks like there is caching enabled. Or something like that. I have also tried to disable caching with put property inside persistence.xml like:
<property name="eclipselink.query-results-cache" value="false"/>Without luck.
Does anyone experience similar problems?
Any ideas?
Regards

Answer 1

Set the entity class as
@Entity
@Cacheable(false)
public class entity{
}