Oh, sorry.
It's clear that the upstream is sending 413 errors, not the nginx himself.
Should read the log more carefully.
Sorry again.
Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,285564,285565#msg-285565
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Hello,
I was getting the bunch of 413 statuses in the access log along with getting
explicit error messages about client (logstash in my case, seems like it was
trying to send bodies around 100 megabytes) trying to post body larger than
the client_max_body_size. After I raised this setting to
