how to reproduce. In a ubuntu 20.04 perfect apache server with ispconfig 3.2.3 install diferrent php versions following (customised) guide with sury.org. Configure a site to use php(some) with fpm and then change to php(another) fpm then visit site and it shows ERROR 503 - Service Unavailable! the problem is solved if i go to console and command systemctl restart php(another)-fpm The problem doesn't occur if i go php(some) fpm->php another cgi->php another fpm. So my guess is in one scenario one systemctl restart php(another)-fpm is missing. Thanks!
This happens e.g. when you have wrong settings for the starter script of the php-fpm versions or when you started the fpm daemons e.g. by a init script instead of systemctl command.
Thanks lot for your reply! Maybe the error is in the php-fpm socket? (as i didn;t find it in the examples) so i just put the below...
Unfortunatelly leaving this field empty also produces this error after switching between two different php versions in fpm mode
You were right.... I just write it in case somebody finds it usefull... i had in Path to the PHP-FPM init script: php-fpm7.4 wheres the right is Path to the PHP-FPM init script: php7.4-fpm Thank you all!
