'Start the job runner'

def __init__(self, app, nworkers):

    assert (pbs is not None), PBS_IMPORT_MESSAGE
    if (app.config.pbs_application_server and app.config.outputs_to_working_directory):
        raise Exception('pbs_application_server    (file    staging)    and    outputs_to_working_directory    options    are    mutually    exclusive')
    self.__default_pbs_server = None
    self.default_pbs_server
    super(PBSJobRunner, self).__init__(app, nworkers)
    self._init_monitor_thread()
    self._init_worker_threads()
