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  • MySQLd service failed to start (after restarting server)

aaPanel_Kern Issue Description: MySQL is failing to start, and I am encountering the following error message:

root@vmi1517585:~# sudo systemctl restart mysql
Job for mysql.service failed because the control process exited with error code.
See "systemctl status mysql.service" and "journalctl -xeu mysql.service" for details.
I have attempted to restart MySQL multiple times, but the issue persists. Additionally, I have checked the logs, but I was unable to identify the root cause.

Steps Already Taken:

I have attempted to restart the MySQL service multiple times using the following command:

sudo systemctl restart mysql
I have reviewed the logs for any potential issues but found no specific clues as to why MySQL is failing to start.

I followed the suggestion to delete the ./mysql-bin.000188 file from /www/server/data/mysql-bin.index and then restarted MySQL using the following commands:

cp /www/server/data/mysql-bin.index /www/server/data/mysql-bin.index_
/etc/init.d/mysqld restart
I also executed the command to check which mysql-bin files are in the directory:

ls /www/server/data/mysql-bin*
However, the issue remains unresolved.

    a month later
    5 days later

    As I understand that if MySQLd service isn’t starting after a server restart, it could be due to database corruption.

    I would suggest you to follow below steps:

    1. Check error logs using:
      sudo cat /var/log/mysql/error.log

    This will show what’s causing the issue.

    1. Force InnoDB recovery (if tables are corrupted):

    Force InnoDB recovery (if tables are corrupted):

    • Add innodb_force_recovery = 1 in my.cnf under [mysqld]

    • Restart MySQL: sudo systemctl restart mysql

    • You can explore tools like Stellar Repair for MySQL if corruption is severe.

    Check permissions & disk space:
    sudo chown -R mysql:mysql /var/lib/mysql
    df -h # Check disk space

    And yes if the issue persists then restoring from a backup might be the best option also. Try and see!