Issue Plesk Sogo webinterface settings are ignored

[bit]

Server operating system version

Debian 13.7

Plesk version and microupdate number

18.0.81 Update #2

Hi togehter,

Debian Server: 13.7
Plesk: 18.0.81 Update #2

We faced an issue with the settings in Plesk Sogo extentions webinterface settings.
 When we set in Sogo the "Maximum Amount of SOGo-Worker" form 3 to 12 it will be ignored.

We can see that with systemctl status sogo.service
After set to 12 worker and restart the Sogo daemon it still runs with 3 Worker:

sogo.service - SOGo is a groupware server
Loaded: loaded (/usr/lib/systemd/system/sogo.service; enabled; preset: enabled)
Active: active (running) since Wed 2026-10-21 08:05:04 CEST; 1min 26s ago
Invocation: d8953345001a4c95bc31346b598117ca
Docs: Installation and Configuration Guide
Process: 338508 ExecStart=/usr/sbin/sogod -WOWorkersCount ${PREFORK} -WOPidFile /run/sogo/sogo.pid -WOLogFile /var/log/sogo/sogo.log (code=exited, status=0/SUCCESS)
Main PID: 338517 (sogod)
Tasks: 4 (limit: 9272)
Memory: 47.4M (peak: 48M)
CPU: 746ms
CGroup: /system.slice/sogo.service
├─338517 /usr/sbin/sogod -WOWorkersCount 3 -WOPidFile /run/sogo/sogo.pid -WOLogFile /var/log/sogo/sogo.log
├─338519 /usr/sbin/sogod -WOWorkersCount 3 -WOPidFile /run/sogo/sogo.pid -WOLogFile /var/log/sogo/sogo.log
├─338520 /usr/sbin/sogod -WOWorkersCount 3 -WOPidFile /run/sogo/sogo.pid -WOLogFile /var/log/sogo/sogo.log
└─338521 /usr/sbin/sogod -WOWorkersCount 3 -WOPidFile /run/sogo/sogo.pid -WOLogFile /var/log/sogo/sogo.log


This leads in our case to a Sogo exception:
2026-10-21 05:50:48.402 sogod[239077:239077] EXCEPTION: <MySQL4CouldNotOpenChannelException: 0x56475952f770> NAME:NoMoreConnections REASON:cannot open a additional connection ! INFOnull)

At another customer server we have the same situation.

regards,
Norman

 

[bit]

PS: We tried that already but it doesnt help:
plesk ext sogo r