title: Try to send an email null pointer exception
body: <p>I am trying to get an email adresss from a database to make it the "InternetAddress recipient" but it returns me a nullPointerException and no more informations about the problem.
  Here is the code :</p>
  
  <pre><code>public class SendEmail implements ISendMail {
  
  @Override
  public void sendEmail(Action action) {
      if (action.getCopieAction() != null) {
          try {
  
              Properties props = new Properties();
              Session session = Session.getInstance(props);
              Message message = new MimeMessage(session);
              UtilisateurDao user = new UtilisateurDao();
              // récupération du code user de l'utilisateur
  
              Integer codeUserEnCopie = action.getCopieAction();
              System.out.println(codeUserEnCopie);
              Utilisateur util = user.findUserByCode(codeUserEnCopie);
              String mailUserCopie = util.getEMAIL();
  
              InternetAddress recipient = new InternetAddress(mailUserCopie);
              message.setRecipient(Message.RecipientType.TO, recipient);
              message.setSubject("Vous êtes en copie d'une action");
              message.setText("Bonjour, l'utilisateur "
                      + action.getUtilCreation()
                      + " vous à mis en copie d'une action:"
                      + "Nom de l'action : " + action.getObjetAction()
                      + "Détails de l'action : " + action.getTexteAction()
                      + "Date de l'action : " + action.getDateAction());
  
              Transport.send(message);
          } catch (NoSuchProviderException e) {
              System.err.println("Pas de transport disponible pour ce  
                              protocole");
              System.err.println(e);
          } catch (AddressException e) {
              System.err.println("Adresse invalide");
              System.err.println(e);
  
          } catch (MessagingException e) {
              System.err.println("Erreur dans le message");
              System.err.println(e);
  
          }
  
      }
  
  }
  
  }
  </code></pre>
  
  <p>The function that get the user in database</p>
  
  <pre><code>public Utilisateur findUserByCode(Integer codeUser) {
  System.out.println(codeUser);
      Utilisateur util = new Utilisateur();
      util = null;
  
      try{
  
          System.out.println("ddd");
          Query requete = em.createQuery("SELECT u FROM Utilisateur u WHERE 
                      u.codeUtilisateur="+codeUser);
          requete.setParameter("codeuser", codeUser);
          util = (Utilisateur) requete.getSingleResult();
  
      }catch(NoResultException e){
  
          System.out.println(e.getMessage() + e.getCause());
          FacesMessage message = new FacesMessage(e.getMessage() + e.getCause());
          FacesContext.getCurrentInstance().addMessage(null, message);
          e.printStackTrace(); 
      }
  
  
      return util;
  }
  
    and the fonction that calls the fonction sendEmail
  
     public void creerAction(Action action) {
  
  
      try {
          ISendMail sendMail = new SendEmail();
          sendMail.sendEmail(action);
          System.out.println(action.getCopieAction());
          em.persist(action);
  
          em.flush();
  
          FacesMessage message = new FacesMessage("Action  " + 
    action.getObjetAction() + " ajouté avec succès avec en copie"+ action.getCopieAction());
          FacesContext.getCurrentInstance().addMessage(null, message);
      } catch (PersistenceException e) {
          System.out.println(e.getMessage());
      }
  }
  </code></pre>
  
  <p>How can i do to have more information aboout the error?</p>
  
  <p>STACKTRACE:</p>
  
  <pre><code>javax.faces.el.EvaluationException: javax.ejb.EJBException
  at javax.faces.component.MethodBindingMethodExpressionAdapter.
     invoke(MethodBindingMethodExpressionAdapter.java:102)
  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:593)
  at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1542)
  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 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
  at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
  at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.
      call(ContainerMapper.java:317)
  at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
  at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849)
  at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746)
  at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045)
  at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228)
  at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
  at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
  at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
  at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
  at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
  at com.sun.grizzly.util.AbstractThreadPool$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.ejb.EJBException
  at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215)
  at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113)
  at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901)
  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 com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.
      invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
  at $Proxy699.creerAction(Unknown Source)
  at beans.ActionBean.ajouter(ActionBean.java:57)
  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 com.sun.el.parser.AstValue.invoke(AstValue.java:254)
  at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
  at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
  at javax.faces.component.MethodBindingMethodExpressionAdapter.
       invoke(MethodBindingMethodExpressionAdapter.java:88)
  ... 32 more
      Caused by: java.lang.NullPointerException
  at dao.UtilisateurDao.findUserByCode(UtilisateurDao.java:157)
  at dao.SendEmail.sendEmail(SendEmail.java:33)
  at dao.ActionDao.creerAction(ActionDao.java:84)
  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:5388)
  at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619)
  at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.
      invokeNext(InterceptorManager.java:800)
  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.GeneratedMethodAccessor615.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:861)
  at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.
      invokeNext(InterceptorManager.java:800)
  at com.sun.ejb.containers.interceptors.InterceptorManager.
       intercept(InterceptorManager.java:370)
  at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360)
  at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348)
  at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.
      invoke(EJBLocalObjectInvocationHandler.java:214)
  ... 43 more
  
     the DAO
  
  public Utilisateur findUserByCode(Integer codeUser) {
  System.out.println(codeUser);
      Utilisateur util = new Utilisateur();
      util = null;
  
      try{
  
          System.out.println("ddd");
          Query requete = em.createQuery(SELECT_BY_CODE_USER);
          requete.setParameter("codeuser", codeUser);
          util = (Utilisateur) requete.getSingleResult();
  
      }catch(NoResultException e){
  
          System.out.println(e.getMessage() + e.getCause());
          FacesMessage message = new FacesMessage(e.getMessage() + e.getCause());
          FacesContext.getCurrentInstance().addMessage(null, message);
          e.printStackTrace(); 
      }
  
  
      return util;
  }
  </code></pre>