TL;DR
Just add a line like below in your application.properties file:
server.max-http-header-size=64kb
Enter fullscreen mode
...
For further actions, you may consider blocking this person and/or reporting abuse
What's in your headers to be so large?! 😯
Auth token, request trace id and others security things
It is the problem with browser,Which is automatically sending you request with https instead of http.Try in different browsers.It will work for sure