Nginx Proxy seems to send twice the same request to the backend

[Arnaud Le-roy]

Hello,

> 
> The error indicate that your backend server closed the connection.  
> That's more less all nginx knows, so if you want to find out why 
> your backend did this - consider looking into the backend.
> 

i found the problem, there is by default a 180s timeout on my backend.


> Could you please double-check that the behaviour you describe 
> appears when using nginx 1.13.2 and with proxy_next_upstream 
> switched off?

effectively, i tested proxy_next_stream off only on nginx/1.10.3 so i will confirm if same behavior on nginx/1.13.2