com.arjuna.ats.internal.jts.orbspecific.coordinator.ArjunaTransactionImple's doBeforeCompletion() method assumes that the "controlHandle" field is initialized to a non-null value. However, com.arjuna.ats.internal.jts.orbspecific.interposition.ServerControl does not do said initialization despite the fact that the apparent contract published in com.arjuna.ats.internal.jts.orbspecific.ControlImple specifies that "The derived classes are responsible for setting everything up, including adding the control to the list of controls...".