mysql报错Do you already have another mysqld server running on socket

背景：启动mysql失败报错如下显示

# /etc/init.d/mysqld start
Starting MySQL...... ERROR! The server quit without updating PID file (/mysql/data/DB-1.pid).

查看日志发现了如下两条：

2018-01-13 16:57:13 19796 [ERROR] Do you already have another mysqld server running on socket: /application/mysql-5.6.36/tmp/mysql.sock ?
2018-01-13 16:57:13 19796 [ERROR] Aborting

发现问题出在/application/mysql-5.6.36/tmp/mysql.sock

检查/etc/my.cnf下mysql配置文件确认sock文件在/appkication/mysql/tmp下

[mysqld]
user=mysql
port=3306
socket=/application/mysql-5.6.36/tmp/mysql.sock
basedir=/application/mysql
datadir=/mysql/data
server-id=3306
general_log=off
log-error=/mysql/error.log
log-bin=/mysql/log/bin-log
binlog-format=ROW

检查该路径发现tmp路径属于root

mysql报错Do you already have another mysqld server running on socket

将该路径分配给mysql用户重启mysql，问题解决

# chown -R mysql.mysql tmp/
# /etc/init.d/mysqld start
Starting MySQL....... SUCCESS!