connect() failed (111: Connection refused) while connecting to upstream

  • Posted January 10, 2020
  • Nginx


I have update my website build on flask by pulling updates from git and I got this:

2020/01/10 20:42:02 [error] 2906#2906: *1 connect() to unix:/home/bartek/config/website.sock failed (111: Connection refused) while connecting to upstream, client:, server:, request: "GET /favicon.ico HTTP/1.1", upstream: "uwsgi://unix:/home/bartek/config/website.sock:", host: "", referrer: ""

I haven’t done anything else just pulling repo. I reboot server. I have checked uwsgi settings and nginx but nothing has changed. I have seen many same issue with it where it was to many services going but I have checked with command netstat -plant and I got this:

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0    *               LISTEN      2902/nginx: master  
tcp        0      0 *               LISTEN      714/systemd-resolve 
tcp        0      0    *               LISTEN      918/sshd            
tcp        0      0    ESTABLISHED 3001/sshd: [accepte 
tcp        0      0    ESTABLISHED 1756/sshd: bartek [ 
tcp        0      0   ESTABLISHED 3031/sshd: unknown  
tcp        0      0      SYN_RECV    -                   
tcp        0      0      SYN_RECV    -                   
tcp        0      0    ESTABLISHED 1477/sshd: bartek [ 
tcp        0      0      SYN_RECV    -                   
tcp        0      0    ESTABLISHED 1126/sshd: bartek [ 
tcp        0    340    ESTABLISHED 2599/sshd: bartek [ 
tcp6       0      0 :::80                   :::*                    LISTEN      2902/nginx: master  
tcp6       0      0 :::22                   :::*                    LISTEN      918/sshd  

Actually I have no clue where to start now or how to solve it. Could anyone provide some solutions

Thanks in advance! Bart


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It sounds like that your Flesk application is not running. Make sure that you start your application and then it should work as expected.

Besides that what I could suggest is creating a systemd unit file. Creating a systemd unit file will allow Ubuntu’s init system to automatically start uWSGI and serve the Flask application whenever the server boots.

You can take a look at this article her eon how to set that up:—-configuring-uwsgi

On another note, here is a link to an answer on how to troubleshoot common Nginx problems:

And here is also a quick video demo on how to do that as well:

Hope that this helps! Regards, Bobby