[jboss-user] [JBoss Portal] - Unable to locate current JTA transaction?

when call the portal mbean UserModule mbean = (UserModule) MBeanProxyExt | .create(UserModule.class, ObjectNameFactory | .create("portal:service=Module,type=User")); | mbean.getUserCount(); the application throws exception as follows, 20:36:21,875 ERROR [HibernateUserModuleImpl] Cannot count users | org.hibernate.HibernateException: Unable to locate current JTA transaction | at org.hibernate.context.JTASessionContext.currentSession(JTASessionContext.java:61) | at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:544) | at org.jboss.portal.identity.db.HibernateUserModuleImpl.getCurrentSession(HibernateUserModuleImpl.java:298) | at org.jboss.portal.identity.db.HibernateUserModuleImpl.getUserCount(HibernateUserModuleImpl.java:275) I search some same problems on the forum but no good answers, some one said we should put such config to jboss-porlet.xml <transaction> | <trans-attribute>Required</trans-attribute> | </transaction> but i didn't call it in a portlet so it didn't work. Anyone can explain the reason of 'Unable to locate current JTA '?? thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149421#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...