7 Replies Latest reply on May 27, 2013 5:22 AM by Long Hoang

    JBoss 6EAP on OpenShift, too many active sessions

    Long Hoang Newbie

      I am using JSF 2 on JBoss 6 EAP. I made a sample application which used JSF as the View, EJB for logic and JPA for Persistence. The bean in JSF has RequestScoped. EJB is stateless.

      This is index.xhtml:

       

      <?xml version='1.0' encoding='UTF-8' ?>
      <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
      <html xmlns="http://www.w3.org/1999/xhtml"
        
      xmlns:h="http://java.sun.com/jsf/html"
        
      xmlns:c="http://java.sun.com/jsp/jstl/core">
        
      <h:head>
        
      <title>Long HDi</title>
        
      </h:head>
        
      <h:body>
        
      <c:forEach var="tweet" items="#{tweets.getAll}">
        
      <p>
        #{tweet.content}
      <br />
        
      </p>
        
      </c:forEach>
        
      </h:body>
      </html>

       

      JSF Bean:

       

      @Named("tweets")
      @RequestScoped
      public class Tweets implements Serializable {
        
      @EJB
        
      private TweetServiceLocal tweetService;
        
      private List<Tweet> tweets;

        
      public List<Tweet> getGetAll() {
        
      return tweetService.findAllSortedByTimeDesc();
        
      }
      }

       

      EJB:

       

      @Stateless
      public class TweetService implements TweetServiceLocal {

        
      @PersistenceContext(unitName = "LongHDi-ejbPU")
        
      private EntityManager em;

        
      @Override
        
      public Tweet create(final String content, final Date postTime) throws ContentTooLargeException {
        
      if (content.length() > 480)
        
      throw new ContentTooLargeException("Content must have less than 480 charaters!");
        
      else {
        
      try {
        
      Tweet tweet = new Tweet();
        tweet
      .setContent(content);
        tweet
      .setPostTime(postTime);
        em
      .persist(tweet);
        
      return tweet;
        
      } catch (Exception e) {
        
      return null;
        
      }
        
      }
        
      }

        
      @Override
        
      public java.util.List<Tweet> findAllSortedByTimeDesc() {
        
      return em.createNamedQuery("Tweet.findAllSortedByTimeDesc").getResultList();
        
      }

      }

       

      When I sent a few hundred requests to it, the JBoss 6 server threw this exception:

       

      JBWEB000065: HTTP Status 500 - JBWEB000209: Session creation failed due to too many active sessions

      JBWEB000309
      : type JBWEB000066: Exception report

      JBWEB000068
      : message JBWEB000209: Session creation failed due to too many active sessions

      JBWEB000069
      : description JBWEB000145: The server encountered an internal error that prevented it from fulfilling this request.

      JBWEB000070
      : exception

      javax
      .servlet.ServletException: JBWEB000209: Session creation failed due to too many active sessions
        javax
      .faces.webapp.FacesServlet.service(FacesServlet.java:606)
      JBWEB000071
      : root cause

      java
      .lang.IllegalStateException: JBWEB000209: Session creation failed due to too many active sessions
        org
      .apache.catalina.session.StandardManager.createSession(StandardManager.java:297)
        org
      .apache.catalina.connector.Request.doGetSession(Request.java:2651)
        org
      .apache.catalina.connector.Request.getSession(Request.java:2357)
        org
      .apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:790)
        com
      .sun.faces.context.ExternalContextImpl.getSession(ExternalContextImpl.java:157)
        com
      .sun.faces.application.view.FaceletViewHandlingStrategy.getSession(FaceletViewHandlingStrategy.java:494)
        com
      .sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:400)
        com
      .sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
        javax
      .faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)
        com
      .sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
        com
      .sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        com
      .sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        javax
      .faces.webapp.FacesServlet.service(FacesServlet.java:594)

       

      My question is: why did the server create so many sessions? I used RequestScope and Stateless bean, how come they end up in sessions? What can I do to overcome this situation? If I use only servlet and JSP, when there are too many requests, the server is slowed down but at least it is not halted like this.