javax.ejb.EJBException при сохранении объекта

У меня есть сущность под названием Medico , которая была создана как класс сущности из базы данных, поэтому я думаю, что определение сущности здесь отказоустойчиво, тем не менее определение следующее:

@Entity
@Table(name = "medico")
@XmlRootElement
@NamedQueries({All named queries here})
public class Medico implements Serializable {
private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @NotNull
    @Column(name = "idMedico")
    private Integer idMedico;
    @Basic(optional = false)
    @NotNull
    @Column(name = "Identificacion")
    private int identificacion;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Primer_Nombre")
    private String primerNombre;
    @Size(max = 33)
    @Column(name = "Segundo_Nombre")
    private String segundoNombre;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Primer_Apellido")
    private String primerApellido;
    @Size(max = 33)
    @Column(name = "Segundo_Apellido")
    private String segundoApellido;
    @Basic(optional = false)
    @NotNull
    @Column(name = "Telefono")
    private long telefono;
    @Column(name = "Telefono_Celular")
    private BigInteger telefonoCelular;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Direccion")
    private String direccion;
    // Constructors..
    // Getters and setters..
}

Я хочу создать новые объекты Medico в базе данных MySql, и вот как я это делаю:

@ManagedBean
@ViewScoped
public class ConsultaMedicos implements Serializable {
// Variables Definition ..
@EJB
private DoctorsFacadeLocal doctorsFacade; 
// Constructor and other methods ..
public String save()
    {
        try{
            doctorsFacade.save(consultedDoctor);
            FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_INFO, CREATE_SUMMARY, null);
            FacesContext.getCurrentInstance().addMessage(CREATE_SUMMARY, fm);
        }
        catch(Exception ex){
            FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, CREATE_ERROR_SUMMARY, null);
            FacesContext.getCurrentInstance().addMessage(CREATE_ERROR_SUMMARY, fm);
            return null;
        }
        return "listaMedicos.xhtml";
    }
...
}  

@Local
public interface DoctorsFacadeLocal {

    List<Medico> findAllDoctors();
    Medico findDoctorByIdNumber(int identificacion);
    void edit(Medico medico);
    void save(Medico medico);
}  

@Stateless
public class DoctorsFacade implements DoctorsFacadeLocal {

    @PersistenceContext
    private EntityManager em;
// Other methods.. 
    @Override
    @TransactionAttribute(TransactionAttributeType.REQUIRED)
    public void save(Medico medico)
    {
        em.persist(medico);
        em.flush();
    }
}

После вызова save () со своей страницы JSF я получаю следующее исключение:

javax.ejb.EJBException
    at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5194)
    at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5092)
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4880)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2039)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1990)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
    at $Proxy157.save(Unknown Source)
    at com.lemm.web.bean.ConsultaMedicos.save(ConsultaMedicos.java:89)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:737)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:467)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:254)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:228)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:662)
Caused by: javax.validation.ConstraintViolationException: Bean Validation constraint(s) violated while executing Automatic Bean Validation on callback event:'prePersist'. Please refer to embedded ConstraintViolations for details.
    at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.validateOnCallbackEvent(BeanValidationListener.java:90)
    at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.prePersist(BeanValidationListener.java:62)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyListener(DescriptorEventManager.java:698)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyEJB30Listeners(DescriptorEventManager.java:641)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.executeEvent(DescriptorEventManager.java:200)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectClone(UnitOfWorkImpl.java:4216)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.cloneAndRegisterNewObject(RepeatableWriteUnitOfWork.java:576)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalRegisterObject(UnitOfWorkImpl.java:2883)
    at org.eclipse.persistence.internal.sessions.MergeManager.registerObjectForMergeCloneIntoWorkingCopy(MergeManager.java:932)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChangesOfCloneIntoWorkingCopy(MergeManager.java:492)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChanges(MergeManager.java:263)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.mergeCloneWithReferences(UnitOfWorkImpl.java:3467)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.mergeCloneWithReferences(RepeatableWriteUnitOfWork.java:363)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.mergeCloneWithReferences(UnitOfWorkImpl.java:3427)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.mergeInternal(EntityManagerImpl.java:452)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.merge(EntityManagerImpl.java:429)
    at com.sun.enterprise.container.common.impl.EntityManagerWrapper.merge(EntityManagerWrapper.java:286)
    at com.lemm.ejb.facade.DoctorsFacade.save(DoctorsFacade.java:61)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5367)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:801)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144)
    at sun.reflect.GeneratedMethodAccessor78.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:862)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:801)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:371)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5339)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5327)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214)
    ... 47 more

Что я делаю не так? Что мне не хватает?
Если он служит для чего-нибудь, вот мой persistence.xml

<persistence-unit name="lemmPU" transaction-type="JTA">
    <jta-data-source>jdbc/lemmdb</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
    </properties>
</persistence-unit>