throws Exception {
MapReduceService mapReduceService = getService();
mapReduceService.registerJobSupervisorCancellation(getName(), getJobId(), jobOwner);
JobSupervisor supervisor = mapReduceService.getJobSupervisor(getName(), getJobId());
if (supervisor != null) {
supervisor.cancel();
}
}
@Override
protected void writeInternal(ObjectDataOutput out)