Symptoms
In some circumstances, you may find that Roundcube loads with the following error message:
DATABASE ERROR: CONNECTION FAILED!
Unable to connect to the database!
Please contact your server-administrator.
And the Roundcube databases in /home/$user/etc/$domain are not present.
Description
The issue is most often caused by the cPanel PHP-FPM process hanging onto connections. Sending PHP-FPM a hard restart generally addresses the problem.
Workaround
To restart the process, we recommend running these commands:
/scripts/restartsrv_cpanel_php_fpm --stop
/scripts/restartsrv_cpanel_php_fpm --start
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