Use JBoss loader

In file:
server\default\deploy\jbossweb-tomcat55.sar\META-INF\jboss-service.xml

Change this attribute to "true" to use the JBoss loader, this was needed for our application to be able to read resources from the classpath.

true

Exceptions

hibernate.PersistentObjectException: detached entity passed to persist

Solution:
object = entityManager.merge(object);

Changes to "object" will be synchronized to database when flushed next time. Force flush using entitityManager.flush()