Debug messages are logged by Plesk in spite of the fact that filter priority is set to 0

Symptoms

Debug messages are logged by Plesk in spite of the fact that filter priority is set to 0 in /usr/local/psa/admin/conf/panel.ini:

CONFIG_TEXT: ...
[debug]

;enabled = on

[log]

; Log messages verbosity level (from 0 to 7)
; 0 - only critical errors, 7 - all including debug messages, default - 3
filter.priority = 0
...

Cause

According to description when filter priority is set to 0 Plesk should not generate debug level messages in the logs.
The issue is submitted as a bug #PPPM-8771 which is planned to be fixed in one of the future Plesk updates.

Resolution

As a workaround,

1. Connect to the server via SSH.

2. Open /usr/local/psa/admin/conf/panel.ini file in any editor. For example:

   # vi /usr/local/psa/admin/conf/panel.ini

3. Comment comment out the filter.priority directive:

   # cat /usr/local/psa/admin/conf/panel.ini | grep filter.priority
   ;filter.priority = 7

Additional Information

How to enable debug mode in Plesk Onyx and earlier versions for Linux?