AcquireLock stored a constant value and ReleaseLock was an unconditional DEL, so a holder that outlived its TTL deleted the next holder's lock. This hits Fetch, Evict and gems push/yank.
- store a random owner token with SET NX PX and return it from AcquireLock
- release via a Lua compare-and-delete keyed on that token
- carry the token through Fetch, Evict and Engine.Lock's release func
- release the Fetch lock with an uncancelled context
- make Engine.Lock's busy 503 message generic
Reviewed-on: #156
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
unkin-agent
b0d60b3e8a