413 nginx config_error ai_generated true

413 Request Entity Too Large: client intended to send too large body: 2097152 bytes exceeds client_max_body_size

ID: nginx/client-body-buffer-size-exceeded-with-413

Also available as: JSON · Markdown

95%Fix Rate

90%Confidence

1Evidence

2024-01-10First Seen

Version Compatibility

Version	Status	Introduced	Deprecated	Notes
nginx 1.24.0	active	—	—	—
nginx 1.25.3	active	—	—	—
nginx 1.26.0	active	—	—	—

Root Cause

The HTTP request body size exceeds the limit set by the client_max_body_size directive in nginx configuration.

generic

Official Documentation

https://nginx.org/en/docs/http/ngx_http_core_module.html#client_max_body_size

Workarounds

95% success Increase client_max_body_size in the http, server, or location block. Example: http { client_max_body_size 10m; }
```
Increase client_max_body_size in the http, server, or location block. Example:
  http {
      client_max_body_size 10m;
  }
```
85% success If using a reverse proxy, also ensure the upstream server (e.g., PHP-FPM, Node.js) has matching body size limits. For PHP-FPM, edit php.ini: upload_max_filesize = 10M post_max_size = 10M
```
If using a reverse proxy, also ensure the upstream server (e.g., PHP-FPM, Node.js) has matching body size limits. For PHP-FPM, edit php.ini:
  upload_max_filesize = 10M
  post_max_size = 10M
```

中文步骤

Increase client_max_body_size in the http, server, or location block. Example:
  http {
      client_max_body_size 10m;
  }

If using a reverse proxy, also ensure the upstream server (e.g., PHP-FPM, Node.js) has matching body size limits. For PHP-FPM, edit php.ini:
  upload_max_filesize = 10M
  post_max_size = 10M

Dead Ends

Common approaches that don't work:

Increase client_body_buffer_size only 90% fail
The error is about client_max_body_size, not client_body_buffer_size. Buffer size is separate from the maximum allowed body size.
Set client_max_body_size in a location block without specifying the server block 50% fail
If the location block is inside a server block that has a smaller limit, the server block limit may still apply depending on inheritance. Must set at http, server, or location level correctly.
Increase system file descriptor limits 100% fail
This is a request size limit, not a file descriptor issue.