[GH-ISSUE #1716] 502 Bad Gateway #1354

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opened 2026-02-27 11:16:41 +03:00 by kerem · 4 comments

kerem commented

2026-02-27 11:16:41 +03:00

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Originally created by @Dablakbandit on GitHub (Apr 10, 2019).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1716

Impacted versions

Modoboa: Latest
installer used: Yes
Webserver: Nginx

Steps to reproduce

Install on Ubuntu 18.04.2 LTS

Current behavior

Link to log:
test.log

Video/Screenshot link (optional)

Originally created by @Dablakbandit on GitHub (Apr 10, 2019). Original GitHub issue: https://github.com/modoboa/modoboa/issues/1716 # Impacted versions * Modoboa: Latest * installer used: Yes * Webserver: Nginx # Steps to reproduce Install on Ubuntu 18.04.2 LTS # Current behavior Link to log: [test.log](https://github.com/modoboa/modoboa/files/3064434/test.log) # Video/Screenshot link (optional) ![image](https://user-images.githubusercontent.com/5752611/55889988-0a11ab00-5c06-11e9-8ba0-d9032d09d8d4.png)

kerem closed this issue

2026-02-27 11:16:41 +03:00

kerem commented

2026-02-27 11:16:42 +03:00

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@tonioo commented on GitHub (Apr 29, 2019):

@Dablakbandit Have you checked if uwsgi is running?

@tonioo commented on GitHub (Apr 29, 2019): @Dablakbandit Have you checked if uwsgi is running?

kerem commented

2026-02-27 11:16:42 +03:00

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@codywarmbo commented on GitHub (Jun 4, 2019):

I also get this sporadically. Sometimes all is well, but my webmail solution often fails to authenticate and when I check the admin interface this error appears, only to go away moments later and all is operational again.

@codywarmbo commented on GitHub (Jun 4, 2019): I also get this sporadically. Sometimes all is well, but my webmail solution often fails to authenticate and when I check the admin interface this error appears, only to go away moments later and all is operational again.

kerem commented

2026-02-27 11:16:42 +03:00

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@peterchibunna commented on GitHub (Jul 31, 2019):

I get this too. Checking the error log yields

connect() to unix:/run/uwsgi/app/modoboa_instance/socket failed (13: Permission denied) while connecting to upstream

@peterchibunna commented on GitHub (Jul 31, 2019): I get this too. Checking the error log yields ``` connect() to unix:/run/uwsgi/app/modoboa_instance/socket failed (13: Permission denied) while connecting to upstream ```

kerem commented

2026-02-27 11:16:42 +03:00

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@peterchibunna commented on GitHub (Jul 31, 2019):

I finally figured out why. uwsgi is opening a socket it cannot read from. Change the chmod-socket parameter from 660 to 666 in /etc/uwsgi/apps-enabled/modoboa_instance.ini and /etc/uwsgi/apps-enabled/automx_instance.ini

@peterchibunna commented on GitHub (Jul 31, 2019): I finally figured out why. **uwsgi** is opening a socket it cannot read from. Change the `chmod-socket` parameter from `660` to `666` in `/etc/uwsgi/apps-enabled/modoboa_instance.ini` and `/etc/uwsgi/apps-enabled/automx_instance.ini`