Although not overly common, the "waiting for an available worker" error has happened at least twice in as many months:
- T308989: Refill tool stuck "waiting for an available worker"
- T310751: Refill tool stuck "waiting for an available worker"
- T311707: Refill tool stuck "waiting for an available worker" due to database lag
Investigate
T310752: Investigate root cause of recurrent API worker failures