- All Joomla websites hosted on single virtual server are down.
- Trying to access any of the sites, web browsers display following errors:
Infinite loop detected in JError
Database Error: Unable to connect to the database:Could not connect to MySQL
- phpMyAdmin web interface displays login screen would not allow to login (simply reloads the page after submitting credentials).
- Trying to connect to MySQL via console fails with errors:
ERROR 1040 (hy000): Too many connections
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
mySQL log file /var/log/mysql/error.log finally revealed that the problem was caused by lack of space on the disk:
[ERROR] /usr/sbin/mysqld: Disk is full writing './<database_name>/<table_name>.MYD' (Errcode: 28). Waiting for someone to free space... (Expect up to 60 secs delay for server to continue after freeing disk space)
Pretty obvious - free up some space on the hard drive.