What Causes 499 Errors in Nginx, and How Can I Prevent Them?

[Marcustaylor222]

Hi everyone,

I’ve been troubleshooting 499 errors in my Nginx server and found that this status code happens when the client closes the connection before the server responds. In my research, I came across a few helpful resources that I found on search engines explaining causes and solutions:

• What is HTTP 499 Status Code and How to Fix it?

• What Is the 499 Status Code, and How To Avoid It? | ResultFirst

These suggest issues like long response times, timeout settings, and client behavior. Has anyone dealt with this before? What solutions worked for you? Also, if you have other helpful resources, please share!

Looking forward to your insights.

[psychmarz]

Important point, we also track how long nginx takes to service the requests, and these 499s happen within anywhere from 5ms to maybe 20ms, so it’s not because the backend is slow/timing out.

[psychmarz]

@psychmarz

within anywhere from 5ms to maybe 20ms, so it’s not because the backend is slow/timing out. 9Apps Tutuapp

Important point