def run_recover_tasks(host, guest, instance, on_migration_failure):
 while on_migration_failure:
  task = on_migration_failure.popleft()
  if (task == 'unpause'):
   try:
    state = guest.get_power_state(host)
    if (state == power_state.PAUSED):
     guest.resume()
   except Exception as e:
    LOG.warning(_LW('Failed to resume paused instance before live-migration rollback %s'), e, instance=instance)
  else:
   LOG.warning(_LW("Unknown migration task '%(task)s'"), {'task': task}, instance=instance)

def run_recover_tasks ( host , guest , instance , on_migration_failure ) : while on_migration_failure : task = on_migration_failure . popleft ( ) if ( task == 'unpause' ) : try : state = guest . get_power_state ( host ) if ( state == power_state . PAUSED ) : guest . resume ( ) except Exception as e : LOG . warning ( _LW ( 'Failed to resume paused instance before live-migration rollback %s' ) , e , instance = instance ) else : LOG . warning ( _LW ( "Unknown migration task '%(task)s'" ) , { 'task' : task } , instance = instance )
run any pending migration recovery tasks .