Hi,

Nginx version: nginx/1.20.2

Cache config:
proxy_cache_path /nginx/cache levels=1:2 keys_zone=bla:20m max_size=10g inactive=20m use_temp_path=off;

I had a problem while using tmpfs mount for nginx cache dir, my automation mounted it over and over again(so each time nginx created a new set of base dirs [a-z]), but after a few mounts, it could no longer create new base dirs(no more memory) and writes to the cache dir failed with:
[crit] 31334#31334: *128216 mkdir() "/nginx/cache/4" failed (13: Permission denied) while reading upstream

But nginx still accepted connections and the client got a hangup during transfer each time.
How can I fail nginx when this thing happens, so clients will not get to it ?

Thanks.