The server quit without updating PID file

启动MySQL报错：[root@localhost log]# service mysql startStarting MySQL...The server quit without updating PID file [FAILED]/data/localhost.localdomain.pid). 查看error.log:log-error=/var/log/error.log忽略warning，看error2020-12-11T14:15:20.074345Z 0 [ERROR] Unix socket lock file is empty /tmp/mysql.sock.lock.2020-12-11T14:15:20.074362Z 0 [ERROR] Unable to setup unix socket lock file.2020-12-11T14:15:20.074377Z 0 [ERROR] Aborting 解决办法： 进入/tmp/查看mysql.sock.lock，文件大小为0，直接删除该文件rm  -rf mysql.sock.lock再启动mysql：service mysql start。即可启动成功。 [root@localhost log]# service mysql start Starting MySQL.                                            [  OK  ]