CentOS MySQL server won't start

Posted on January 11, 2015

Hey,

I have installed MySQL on my CentOS 7 server, but it won’t start. When i try to start it with the command “sudo service mysqld start” i get the message “Job for mysqld.service failed. See ‘systemctl status mysqld.service’ and ‘journalctl -xn’ for details.” after about 5 minutes.

I have searched Google all day, and just can’t find a solution…

Log: 150111 10:06:40 mysqld_safe A mysqld process already exists 150111 10:20:35 mysqld_safe A mysqld process already exists 150111 10:30:35 mysqld_safe A mysqld process already exists 150111 10:40:35 mysqld_safe A mysqld process already exists

Please help…

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sizwan

March 3, 2018

Reinstalling MySQL might help. First uninstall, then delete the /var/lib/mysql and /etc/my.cnf or /etc/my.cnf.rpmsave, then Restart, then Install.

rajatsaha08

December 8, 2018

Had the same problem. Use command : #sudo tail -f /var/log/messages|grep -i mysql to check if SELinux policy is causing the issue. If so, first check if SELinux policy is enables using command #sestatus. If it shows enabled, than disable it. To disable, i)# vi /etc/sysconfig/selinux ii)change ‘SELINUX=enforcing’ to ‘SELINUX=disabled’ iii)restart linux iv)check with ‘sestatus’ and it should show “disabled”

Uninstall and reinstall mysql. It should be working.