mysql is dead but subsys locked

Question

I am using PHP-mysql on Linux (RHEL 5.0) For First Time
When I tried to connect to MySQL from my PHP Script using mysqli_connect.
It Displayed

Answer 1

first,make sure that /etc/init.d/mysqld is running from /usr/local/mysql/bin then,kill mysqld ,delete the lock file and restart it.

Answer 2

1. tail /var/log/mysqld.log to check the error log

2. then do the following actions:

   rm /var/lock/subsys/mysqld chown -R mysql.mysql /var/run/mysqld

Answer 3

Rebooting the server worked for me. Please remember to start all the services once you reboot in case you haven't added 'chkconfig' for them, lets say httpd, named and mysql.

Answer 4

i use command kill, step by step:

1. use command service mysqld status for find PID mysqld
2. kill -9 PID
3. use command service mysqld status again for find PID mysqld
4. kill -15 PID
5. check again with command service mysqld status , check until the PID dead OR subsys locked
6. use command service mysqld start

Answer 5

I had this problem with my OTRS server after I tried to update a to large package.

The solution was:

copy for safty:

cp /var/lock/subsys/mysqld /root/mysqld

than delete it

rm /var/lock/subsys/mysqld

than close all services that depends on mysql:

service httpd stop
service otrs stop

after that:

service mysqld restart
service httpd restart
service otrs restart

System is CentOS 6.x

Answer 6

This (and all sorts of other weird errors) can also happen if you have a full disk. In my case, my /var partition had filled up. Freeing up space allowed mysqld to restart again.