JPA - Unknown entity bean class

Question

Hopefully, I can explain this issue properly. I have 3 classes that deals with my entities.

@MappedSuperclass
public abstract class Swab implements ISwab {
         


        

Answer 1

I solved this issue creating a ContextListener in to my Web App, invoking the close of the entity manager factory at destroy context, :

public void contextDestroyed(ServletContextEvent servletContextEvent) {
    try {
        logger.info("contextDestroyed...");
        LifeCycleManager lifeCycleManager = ServiceLocator.getLifeCycleManager();
        lifeCycleManager.closeEntityManagerFactory();

    } catch (Exception e) {
        logger.error(e.getMessage(), e);
    }
}

I also create a bean with name LifeCycleManager and inside them invoke a DAO method to close the entity manager factory:

public void closeEntityManagerFactory() throws BusinessException {
        logger.info("closeEntityManager");
        try {
            logger.info("closing entity manager factory...");
            genericDAO.closeEntityManagerFactory();
            logger.info("Entity manager factiry closed");
        } catch (Exception e) {
            throw new BusinessException(BusinessErrorCode.CODIGO_EJEMPLO_01, Severity.ERROR);
        }
    }

Inside the DAO:

...

@Autowired
private EntityManagerFactory entityManagerFactory;

...

public void closeEntityManagerFactory() {
        logger.info("closing entity manager factory");
        getEntityManagerFactory().close();
        logger.info("entity manager factory closed");   
    }

Using this each time I deploy a change from my eclipse environment the destroy context is invoked. I hope could help you guys, my environment is WebLogic Server 11gR1 and JPA 1.0.

Answer 2

According to the error message and what I figure from your code, the error seems to be in the persistence.xml file, can you be a bit more verbose ?

Answer 3

define this entity in class tag inside the persistence.xml

Answer 4

I had the same error and, complementing the information above, my case was a ClassLoader issue. My app has three files. A ejb-module.jar which depends on app-lib.jar (library that contains pojo and database entities) and a web-module.war which depends on app-lib.jar.

In the deployment, the app-lib.jar was loaded twice by the glassfish. Googling, I found out that I should copy the app-lib.jar to a "shared" lib in the glassfish domain. I've copied the postgresql.jar to "domain-dir/lib" and my app-lib.jar to "domain-dir/lib/applibs". Have it done, the app worked like a charm.

The used explanation can be found here: http://docs.oracle.com/cd/E19798-01/821-1752/beade/index.html

Answer 5

Mario was right when he mentions EntityManagerFactory here.

Both:

java.lang.IllegalArgumentException: Unknown entity bean class...

and

java.lang.IllegalStateException: This web container has not yet been started...

These exceptions occur when you redeploy a web application multiple times but didn't close EntityManagerFactory properly.

follow this instruction to register ServletContextListener and this instruction to close EntityManagerFactory properly.