Here is the snippet of code i'm processing | Label l; | for (Label newLabel : labels) { | l = entityManager.createQuery( | "from Label where name = :name and appId = :appId") | .setParameter("name", newLabel.getName()) | .setParameter("appId", appId); | l = (Label) q.getSingleResult(); | if (l != null) { | l.setTrafficLight(tl); | entityManager.merge(l); | } else { | newLabel.setTrafficLight(tl); | newLabel.setAppId(appId); | newLabels.add(newLabel); | } | } | | The loop iterates once and merges the first existing 'Label'. I got the Exception an next q.getSingleResult() .... I did no flush between merge and getSingleResult () ..... Any ideas? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4082975#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...