Caused by: java.lang.ClassNotFoundException: de.xyz.esbmonitor.entities.DataSource from BaseClassLoader@3956f14c{vfs:///C:/development/tools/jboss-6.0.0.Final/server/default/conf/jboss-service.xml}
at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:480) [jboss-classloader.jar:2.2.0.GA]
at java.lang.ClassLoader.loadClass(ClassLoader.java:248) [:1.6.0_24]
at java.lang.Class.forName0(Native Method) [:1.6.0_24]
at java.lang.Class.forName(Class.java:247) [:1.6.0_24]
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:170) [:3.6.0.Final]
at org.hibernate.ejb.Ejb3Configuration.classForName(Ejb3Configuration.java:1260) [:3.6.0.Final]
at org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1332) [:3.6.0.Final]
... 75 more
That looks like a known bug https://issues.jboss.org/browse/JBAS-8872
Where is that de.xyz.esbmonitor.entities.DataSource located?