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| Check if mysqld is running and if the ports are available on the localhost and from the host you try to connect from. | | Check if mysqld is running and if the ports are available on the localhost and from the host you try to connect from. | ||
|- | |- | ||
| Check load on database server using ''top'' | | Check load on database server using '''''top''''' | ||
|- | |- | ||
|Check the ports using ''nmap -Pn localhost'' | |Check the ports using '''''nmap -Pn localhost''''' | ||
|- | |- | ||
|Check the ports from remote using ''nmap -Pn databasehost'' | |Check the ports from remote using '''''nmap -Pn databasehost''''' | ||
|- | |- | ||
|Check the logging ''less /var/log/mysql.log'' | |Check the logging '''''less /var/log/mysql.log''''' | ||
|- | |- | ||
! Fixing | ! Fixing | ||
|- | |- | ||
| Restart mysql service ''service mysqld restart'' | | Restart mysql service '''''service mysqld restart''''' | ||
|} | |} | ||
Revision as of 20:17, 16 April 2020
| Issue description |
|---|
| How to troubleshoot it |
| How to fix it |
| Cannot connect to database |
|---|
| Check if mysqld is running and if the ports are available on the localhost and from the host you try to connect from. |
| Check load on database server using top |
| Check the ports using nmap -Pn localhost |
| Check the ports from remote using nmap -Pn databasehost |
| Check the logging less /var/log/mysql.log |
| Fixing |
| Restart mysql service service mysqld restart |