Caused by: javax.ejb.EJBException: java.lang.NullPointerException
at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:77)
at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190)
at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102)
....
Caused by: java.lang.NullPointerException
at org.jboss.ejb3.security.helpers.EJBContextHelper.getCallerPrincipal(EJBContextHelper.java:69)
at org.jboss.ejb3.EJBContextImpl.getCallerPrincipal(EJBContextImpl.java:136)
at org.jboss.ejb3.examples.chxx.tuner.CachingAuditor.audit(CachingAuditor.java:95)