There has been more than one instance where users have reported issues around EJB3 deployments which leads to exception like this:

Caused by: java.lang.IllegalStateException: Null beannMetaData
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.setupMetaDataLists(BeanInterceptorMetaDataBridge.java:315)
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.initialise(BeanInterceptorMetaDataBridge.java:235)
at org.jboss.ejb3.interceptors.metadata.BeanInterceptorMetaDataBridge.(BeanInterceptorMetaDataBridge.java:138)
at org.jboss.ejb3.interceptors.metadata.AdditiveBeanInterceptorMetaDataBridge.(AdditiveBeanInterceptorMetaDataBridge.java:48)
at org.jboss.ejb3.aop.BeanContainer.initialize(BeanContainer.java:194)
at org.jboss.ejb3.EJBContainer.(EJBContainer.java:249)

One such forum thread discussion is referenced in this JIRA. The issue appears to be around the way the deployment has been packaged. This needs more investigation and a fix (or an explanation about why this happens and the correct way to package the culprit application).