We have 14 Jboss 4.2.2 systems running on the same server, at midnight they all simultaneously update their runDate in the database (Oracle) and occasionally (twice a week ?) they produce this error, any idea what might cause this ?? The only thing I can think is some kind of limit to number of sessions connecting to the underlying oracle database. Thanks, Chris Milburn. [00:00:04,090,JMSHelper] sendMessageToQueue javax.jms.JMSException: Could not create a session: org.jboss.resource.JBossResourceException: Unable to setup connection; - nested throwable: (javax.jms.JMSSecurityException: User: guest is NOT authenticated) at org.jboss.resource.adapter.jms.JmsSessionFactoryImpl.allocateConnection(JmsSessionFactoryImpl.java:403) at org.jboss.resource.adapter.jms.JmsSessionFactoryImpl.createQueueSession(JmsSessionFactoryImpl.java:144) at com.rolfeandnolan.merlin.utility.jmshelper.JMSHelper.sendMessageToQueue(JMSHelper.java:159) at com.rolfeandnolan.merlin.ejb.eventmanager.EventManagerEJB.createEvent(EventManagerEJB.java:131) at sun.reflect.GeneratedMethodAccessor171.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4224624#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...