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

[Maxim Dounin]

Hello!

On Thu, Jul 13, 2017 at 02:18:34PM +0200, Arnaud Le-roy wrote:

> a little question about the error :
> 
> >> 2017/07/09 09:18:31 [error] 38111#38111: *4098505 upstream prematurely closed connection while reading response header from upstream, client: x.x.x.x, server: x.x.com, request: "GET /query?uid=b85cc8a4-b9cd-4093-aea5-95c0ea1391a6_428 
> 
> can you confirm that is my node server that close the 
> connection, for me it seems strange because it process the two 
> request so from my point of view it can't timeout ?

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.

-- 
Maxim Dounin
http://nginx.org/