Renewal fails with error: auto-ssl: failed to obtain lock: closed, context: ngx.timer #286

We are using redis in the backend for storing certificates. We have around 9 lacs certificates in our cache. After every few days we are facing this error and our renewals are failing. We are running around 8 openresty servers. We also noticed sometimes renewal doesn't happen for all the domains present in our cache.

If anyone could provide any help, that would be great.

Thank you in advance.