Question Error 502 Bad Gateway timeout for few seconds after save settings

[Azurel]

Each time updating/change "Apache & nginx Settings" for a single domain the server show for all subscriptions/domains a Error 502 Bad Gateway (for few seconds).

Is here no better way? Is this a bug? This issue is very annoying, you can never work in prime time or test things. I think this is because "restart" nginx? Why plesk "restart" it and not "reload" it with "nginx -s reload"?

CentOS Linux 7.8.2003
Plesk Obsidian Version 18.0.28 Update #2

 

[Bitpalast]

This is because you have not set Apache to graceful restarts. Please see this article on how to do it:

How to enable/disable Apache graceful restart in Plesk

Applicable to: Plesk for Linux Question How to enable/disable graceful restart for Apache in Plesk? How to make Apache reload instead of restarting when applying settings in Plesk? Answer ...

support.plesk.com

 

[Azurel]

Great, thank you very much! In your article was a hint

Graceful restart for Apache is enabled by default on all new Plesk Obsidian installations.

I use Plesk Obsidian and its was not checked, so this is a bug? I migrated from Onyx.

 

[Bitpalast]

.. on all N E W Obisidan installations ...

 

[elrajuela]

Hi, I have the same problem, I have a plesk VPS hosted in OVH. since yesterday all the hosted websites have an error

502 Bad Gateway​

​

nginx​

In Plesk:

Details: [2020-07-14 10:17:31.413] ERR [util_exec] proc_close() failed ['/opt/psa/admin/bin/apache_control_adapter' '--restart' '--restart-interval' '0' '--http-port' '7080' '--https-port' '7081' '--graceful'] with exit code [255] [2020-07-14 10:17:34.409] ERR [panel] Apache config (15947217180.25276600) generation failed: Template_Exception: Can not restart web server: Apache is down, start it instead of graceful Apache is down, start it instead of graceful file: /opt/psa/admin/plib/Service/Driver/Web/Server/Apache.php line: 114 code: 0 plesk sendmail[6363]: Unable to resolve fqdn: Name or service not known plesk sendmail[6363]: It is impossible to detect the FQDN of the host. Please make sure that the host name is correctly specified in /etc/hosts and goes right after the host's IP address. Depending on your OS, you might need to set the host name in /etc/HOSTNAME or /etc/hostname. plesk sendmail[6363]: Unable to retrieve hostname. Use localhost.localdomain instead. Can not restart web server: Apache is down, start it instead of graceful Apache is down, start it instead of graceful

this has happened since I updated Plesk
Me can you help me please?

 

[IgorG]

Check your server hostname with

# hostname

and make sure that it is resolvable to IP of your server first.

 

[elrajuela]

Thanks IgorG!!! the incidence is solved