Issue Error : upstream timed out (110: Connection timed out) while reading response header from upstream

[cipcip]

Server operating system version

Ubuntu 20.04 x86_64

Plesk version and microupdate number

Plesk Obsidian 18.0.49.2

Hello ,
I am facing this error with my app written in Node.js and React . I have other React apps on the same server without any issues .
The only difference is that this app is communicating with Clicksend.com and I suspect that it is taking too long to receive a response from them ?!

The full error is :

2023/02/22 09:33:56 [error] 641517#0: *20358 upstream timed out (110: Connection timed out) while reading response header from upstream, client: client_IP_here, server: api.esanta.xyz, request: "POST /api/v1/order HTTP/2.0", upstream: "https://server_ip:7081/api/v1/order", host: "api.esanta.xyz", referrer: "Santa Postcard Express | eSanta.xyz"

I have tried to add the following NGINX directives to both api subdomain and domain:

proxy_connect_timeout 180s;
proxy_send_timeout 180s;
proxy_read_timeout 180s;
fastcgi_send_timeout 180s;
fastcgi_read_timeout 180s;

But nothing works ...
Do you have any suggestions for me ?

Thank you,
Cristian

 

[Peter Debik]

As you already suspected, the error is caused by an unresponsive script. If no result is delivered to Nginx, it times out.

 

[cipcip]

As you already suspected, the error is caused by an unresponsive script. If no result is delivered to Nginx, it times out.

Thank you for the quick answer . I got suspicious because I saw the port of 7081 in the logs at: https://server_ip:7081/api/v1/order
Is this the port that is used for communication between nginx and apache ?

Thank you,
Cristian

 

[Peter Debik]

Yes, 7081 is used between Nginx and Apache.