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Resolved DB query failed: SQLSTATE[HY000] [2002] No such file or directory

Extra

New Pleskian
Server operating system version
Ubuntu 18.04
Plesk version and microupdate number
18.0.41
Hi! Yesterday evening around 7pm I received the following error message from Plesk:

Server Error

500 Plesk\Exception\Database​

DB query failed: SQLSTATE[HY000] [2002] No such file or directory
TypePlesk\Exception\Database
MessageDB query failed: SQLSTATE[HY000] [2002] No such file or directory
FileMysql.php
Line79

My Database: MariaDB 10.6
 
Please check these KB articles:


With this resolution I get:

root@hXXXXXX:~# #log_bin = /var/log/mysql/mariadb-bin
root@hXXXXXX::~# #log_bin_index = /var/log/mysql/mariadb-bin.inde
root@hXXXXXX::~# #log_slow_verbosity = query_plan
root@hXXXXXX::~# systemctl restart mysql
Job for mariadb.service failed because the control process exited with error code.
See "systemctl status mariadb.service" and "journalctl -xe" for details.
 
root@hXXXXXX:~# #log_bin = /var/log/mysql/mariadb-bin
root@hXXXXXX::~# #log_bin_index = /var/log/mysql/mariadb-bin.inde
root@hXXXXXX::~# #log_slow_verbosity = query_plan
Sorry, but you shouldn't run these lines. Please read instruction carefully:
Comment out the following lines in /etc/my.cnf
 
Error SQLSTATE[HY000] [2002] No such file or directory means that the socket which plesk needs to connect to the sql server does not exist, usually because the sql server crashed.
To see why it crashed, use the commands suggested by systemctl, systemctl status mariadb.service and journalctl -xe.

Before you make any changes to the mysql or mariadb config files, make a backup of said config file and all of /var/lib/mysql.
 
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