Website becomes unavailable after switching to FPM application served by Apache

[Suhitha]

Question: Website becomes unavailable after switching to FPM application served by Apache


Symptoms

• Website becomes unavailable after switching to FPM application served by Apache
• When the PHP version to another one and then back to the initial PHP version the website works again
• In the corresponding /var/log/plesk-phpXX-fpm/error.log the following errors appear despite the fact that the service is running and the website is accessible:

Code Select Expand

ERROR: Another FPM instance seems to already listen on /var/www/vhosts/system/example.com/php-fpm.sock
ERROR: Another FPM instance seems to already listen on /var/www/vhosts/system/example.com/php-fpm.sock
ERROR: Another FPM instance seems to already listen on /var/www/vhosts/system/example.com/php-fpm.sock
ERROR: Another FPM instance seems to already listen on /var/www/vhosts/system/example.com/php-fpm.sock

Cause

The php-fpm.sock file of the affected domain is corrupted


Resolution

Delete the php-fpm.sock file, it will be recreated automatically:

1.Connect to the server via SSH

2.Execute the following command:

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# rm -rf /var/www/vhosts/system/example.com/php-fpm.sock