Hi, I have a an eclipse Java Enterprise project, which consists of a ejb-project and a dynamic-web-project. My web-project needs the ActiveMQ client library to connect to the middleware. So I copied the activemq-all-5.3.jar to the folder WEB-INF/lib and starteted the EAR deployment to my JBoss 5 AS. During the deployment I get the following error stack trace: 13:38:32,642 INFO [PersistenceUnitDeployment] Starting persistence unit persistence.unit:unitName=App2.ear/App2Web.war#activemq 13:38:32,643 ERROR [AbstractKernelController] Error installing to Start: name=persistence.unit:unitName=App2.ear/App2Web.war#activemq state=Create java.lang.RuntimeException: Specification violation [EJB3 JPA 6.2.1.2] - You have not defined a non-jta-data-source for a RESOURCE_LOCAL enabled persistence context named: activemq at org.jboss.jpa.deployment.PersistenceUnitInfoImpl.(PersistenceUnitInfoImpl.java:124) ... ... ... 13:38:34,225 WARN [HDScanner] Failed to process changes org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS): DEPLOYMENTS IN ERROR: Deployment "persistence.unit:unitName=App.ear/App2Web.war#activemq" is in error due to the following reason(s): java.lang.RuntimeException: Specification violation [EJB3 JPA 6.2.1.2] - You have not defined a non-jta-data-source for a RESOURCE_LOCAL enabled persistence context named: activemq The application runs very well, I get no runtime exceptions. What is the meaning of this error message ? What am I doing wrong ? Is this a activemq bug ? Is it a problem of JBoss ? Thank you very much! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4256617#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...