---
# This is not a status code available in the standard, but it exists
# with significant prominence in the wild
set: 4
code: 499
title: Client Closed Request
---

The 499 Client Closed Request status is a non-standard status code introduced by
[nginx][2] for the case when a client closes the connection while nginx is
processing the request.

Source: [nginx][1]

[1]: <http://lxr.nginx.org/source/src/http/ngx_http_request.h#0120>
[2]: <http://nginx.org>