Kb170
Emulab FAQ: Testbed Operations: How do I deal with "Swap out Failure"?
Emulab FAQ: Testbed Operations: How do I deal with "Swap out Failure"?
If something breaks, you just reset the state and go again so it will get whatever it missed the previous time.
Typically though, you do need to reset the DB state:
update experiments set state='active',canceled=0,expt_locked=NULL where pid='XXX' and eid='YYY';
so that it appears active and not busy (not in transition).