title: JPA No transaction is currently active
body: <p>Using JPA with EclipseLink implementation.</p>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>try{
      if(!em.getTransaction().isActive())
          em.getTransaction().begin(); 
      System.out.println(2);
      em.persist(currentUser);
      System.out.println(3);
      if (em.getTransaction().isActive()){
          System.out.println("IS ACTIVE");
      } else {
          System.out.println("NO ACTIVE");
      }
      em.getTransaction().commit();
      System.out.println(4);
      } catch (Exception e){
      completed = false;
      em.getTransaction().rollback();
      System.out.println("ERROR: " + e.getMessage());
  }
  </code></pre>
  
  <p><strong>Error:</strong></p>
  
  <pre><code>INFO: persistOne - Enter
  INFO: 2
  INFO: 3
  INFO: IS ACTIVE
  INFO: [EL Warning]: 2012-01-06 14:45:59.221--UnitOfWork(12492659)--java.lang.IllegalStateException: During synchronization a new object was found through a relationship that was not marked cascade PERSIST: com.maze.model.UserDetail@d52ea.
  
  WARNING: #{accountController.performRegister}: java.lang.IllegalStateException: 
  Exception Description: No transaction is currently active
  javax.faces.FacesException: #{accountController.performRegister}: java.lang.IllegalStateException: 
  Exception Description: No transaction is currently active
      at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
      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:1539)
      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:330)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
      at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
      at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
      at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
      at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
      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.faces.el.EvaluationException: java.lang.IllegalStateException: 
  Exception Description: No transaction is currently active
      at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
      at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
      ... 32 more
  Caused by: java.lang.IllegalStateException: 
  Exception Description: No transaction is currently active
      at org.eclipse.persistence.internal.jpa.transaction.EntityTransactionImpl.rollback(EntityTransactionImpl.java:122)
      at com.maze.service.UserService.persistOne(UserService.java:63)
      at com.maze.controller.request.AccountController.performRegister(AccountController.java:62)
      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:234)
      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)
      ... 33 more
  </code></pre>
  
  <p>The weird thing is that the Transaction is active but the next thing happening is an error of inactivity.</p>
  
  <p><strong>EDIT</strong>
  <em>EntityManager Singleton:</em>
          public class EntityManagerSingleton {</p>
  
  <pre><code>private EntityManagerSingleton(){
  }
  
  private static class EMSingletonHolder{
      private static final EntityManagerFactory emf = Persistence.createEntityManagerFactory("Maze");
      private static final EntityManager em = emf.createEntityManager();
  }
  
  public static EntityManager getInstance(){
      return EMSingletonHolder.em;
  }
  </code></pre>
  
  <p>*Getting the em Instance: *</p>
  
  <pre><code>public abstract class AbstractService {
  protected EntityManager em;
  
  public AbstractService(){
      em = EntityManagerSingleton.getInstance();
  }
  }
  </code></pre>
  
  <p>All other services extends the AbstractService</p>