MySQL server PID file could not being found!

Restart MySQL prompt MySQL server PID file could not being found!

Starting MySQL ... The server quit without updating PID file (/usr/local/mysql/data/rekfan.pid).

I can only hehe it? No.

I do this, first look at whether there is a process, then end, then restart, code:

1. Ps-ef|grep mysqld

1. Kill-9 Process Number

What if you don't fix it? All right, go ahead:

(Solution: Try each!) ）

1. may be/usr/local/mysql/data/rekfan.pid file does not have permission to write

Workaround: Give permission, execute "chown-r mysql:mysql/var/data" "Chmod-r 755/usr/local/mysql/data" and restart mysqld!

2. The MySQL process may already exist in the process

WORKAROUND: Use the command "Ps-ef|grep mysqld" to see if there is a mysqld process, kill with "kill-9 process number" and then restart mysqld!

3. It may be the second time that MySQL is installed on the machine, with residual data affecting the start of the service.

Workaround: Go to MySQL data directory/data See, if there is mysql-bin.index, quickly delete it, it is the culprit. I am using the third method to solve! http://blog.rekfan.com/?p=186

4.mysql The/ETC/MY.CNF profile is used when the configuration file is not specified at startup, please open this file to see if there is a specified data directory (DATADIR) under the [Mysqld] section.

WORKAROUND: Please set this line under [mysqld]: DataDir =/usr/local/mysql/data

5.skip-federated Field Issues

Workaround: Check the/etc/my.cnf file for any skip-federated fields that have not been commented out, and if so, comment them out immediately.

6. Error log directory does not exist

Workaround: Use "Chown" "chmod" command to give MySQL owner and permissions

7.selinux, if it is a CentOS system , the default is to turn on SELinux

Workaround: Close it, open the/etc/selinux/config, change the selinux=enforcing to selinux=disabled and then save the restart machine.

MySQL server PID file could not being found!