What is the name of the domain?
What is the error number?
What is the error message?
Web server is returning an unknnown error
What is the issue you’re encountering
nginx can’t get request from what goes from Cloudflare. It gets browser etc, but empty request. And it answers with code 000
What steps have you taken to resolve the issue?
It happens only sometimes. With the same clients. There can be 1000-2000 such reqeusts per day or about 20.
I can’t figure out why the same client makes the same response and usually it’s ok. But sometimes it gets 520 and nginx in the backend sees empty request.
What are the steps to reproduce the issue?
It happens from time to time. The same request from the same client can go tens thousand times per day successfully and suddenly I see empty request.
Clients can be:Android, iPhone, Mac OS X. I see nothing in common.