from time to time we can't reload the nginx service and get this error... /var/run/nginx.pid: No such file or directory

[Ilan Berkner]

Reloading nginx daemon configuration...cat: /var/run/nginx.pid: No such file
or directory
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or
kill -l [sigspec]

 can't reload.

Any idea why?

I can't stop it or restart it, I have to kill it and start.
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