Getting 502 Bad Gateway

[gagan-ncompass]

2021/10/08 07:31:25 [error] 602#602: *7273 upstream prematurely closed connection while reading response header from upstream,

I have been getting this error for some of endpoints. I am using nginx and actix-web 3.3.2.

I referred to https://stackoverflow.com/questions/36488688/nginx-upstream-prematurely-closed-connection-while-reading-response-header-from and increased the timeout, but I am still getting the same error.

I am thinking that the issue has something to do with my actix-web server.

Any help would be deeply appreciated
Thank you

[aliemjay]

How to reproduce?

[gagan-ncompass]

@aliemjay I have about 30 endpoints running on default actix-web HttpServer and nginx configuration

[kogai]

The same error was observed in our environment while using actix-web 4.0.1.

We don't yet know how to reproduce it, and we are setting the following environment variables in our production environment:
RUST_LOG=info,actix-web=debug.

So, let's observe the logs for a while 👁️.