This exception is thrown when a normal EnterpriseBean exception is thrown.
It acts as a carrier or wrapper for the actual application exception.
The ApplicationException's nested exception will be either an EJB spec
defined ApplicationException ( or a custom exception defined by the bean
developer) or a RemoteException.
The org.apache.openejb.ApplicationException must be caught and its nested
exception rethrown by the bean proxy to the client.
The org.apache.openejb.ApplicationException is non-system exception; it does NOT
indicate a problem with the contaienr itself.