What are those endless requests to the nginx web server?

Question

Nginx

Good afternoon, today I'm looking at 50 requests per second to the nginx server during the day, and it's stable. I look at the logs and see the following:
https://yadi.sk/i/jVyvNJmOehXh6
What is this? And how to get rid of?
Thank you!

Answer 1

Error 400 usually occurs with an ssl error, for example, when trying to go from http to https and vice versa, when a secure connection fails. How to get rid of depends on what exactly happens. Perhaps a redirect from https to http will solve the problem.