javax.ejb.EJBTransactionRolledbackException glassfish 3.1 with EJB - jpa

Question

I have create Entity,DAo and Façade in a Web app. I have no error on my codes but I am getting this exception while using find(T.class,id) method of JPA.An also it says that there is no #Entity annotation on my Entity. But this is not true.How to solve this problem.
MyEntity
#Entity
#Table(name = "uyeler")
public class Uyeler implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#Column(name = "kullaniciadi")
private String kullaniciadi;
#Column(name = "sifre")
private String sifre;
#Column(name = "ad")
private String ad;
#Column(name = "soyad")
private String soyad;
#Column(name = "cinsiyet")
private String cinsiyet;
#Column(name = "ilgialanlari")
private String ilgialanlari;
#Column(name = "dogumtarihi")
private String dogumtarihi;
#Column(name = "eposta")
private String eposta;
#Column(name = "epostahaberdar")
private String epostahaberdar;
public String getKullaniciadi() {
return kullaniciadi;
}
MyDaoImpl;
public abstract class UyelerDaoImpl<T> {
private final static String UNIT_NAME ="KutuphaneOtomasyonuEJB";
#PersistenceUnit(unitName = UNIT_NAME)
private EntityManagerFactory emf = javax.persistence.Persistence.createEntityManagerFactory(UNIT_NAME);
private EntityManager em = emf.createEntityManager();
public Uyeler findMemberByUserName(String username){
return em.find(Uyeler.class, username);
}
}
persistence.xml
<persistence-unit name="KutuphaneOtomasyonuEJB"
transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<non-jta-data-source>jdbc/MySQLConnectionPool</non-jta-data-source>
<class>com.mesutemre.businesModel.Kitaplar</class>
<class>com.mesutemre.businesModel.Uyeler</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.logging.level" value="FINEST" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3307/kutuphane" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="root" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
</properties>
</persistence-unit>
Stacktrace;
WARNING: EJB5184:A system exception occurred during an invocation on EJB UyelerDAO, method: public com.mesutemre.businesModel.Uyeler com.mesutemre.businesDAOs.UyelerDAO.findMemberByUserName(java.lang.String)
WARNING: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:5071) at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4906) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) at
SEVERE: Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean
SEVERE: at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:5071)
SEVERE: at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4906)
SEVERE: at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045)
SEVERE: ... 71 more
SEVERE: Caused by: java.lang.IllegalArgumentException: Unknown entity bean class: class com.mesutemre.businesModel.Uyeler, please verify that this class has been marked with the #Entity annotation.
SEVERE: at org.eclipse.persistence.internal.jpa.EntityManagerImpl.find(EntityManagerImpl.java:648)
SEVERE:

Answer 1

It looks like this is a redeployment/caching problem with GlassFish. If you use transaction type RESOURCE_LOCAL and create the EntityManager manually and redeploy, it may be the case that the old EntityManager or the according factory is still cached by GlassFish and therefore only knows some old values.
The fastest solution should be a restart of GlassFish and redeployment of the application.
Another solution is closing the EntityManagerFactory explicitly on un/redeployment.
Anyway the preferred solution is to use transaction type JTA so the EntityManager gets managed by the container. This is a lot easier to use and less error-prone. Here is a short example:
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
#Stateless
public class FileDAO {
#PersistenceContext
private EntityManager em;
public void store(File file) {
em.persist(file);
}
}
See also:
Persistence-unit as RESOURCE_LOCAL or JTA?
persistence.xml different transaction-type attributes
JPA - Unknown entity bean class
Unknown entity class error message even though the entity is marked with #Entity annotation
Unknown entity bean class after hot deploy: netbeans 6.9 + glassfish 2.1 + eclipselink jpa 2.0