上网搜索了这个错误的常见原因都为能解决，后来在

在/etc/my.cnf 中加入

[mysqld_safe]
log-error=/var/log/mysqld.log

查看mysqld.log 发现

InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
InnoDB: Unable to lock ./ibdata1, error: 11

1.ps -ef|grep mysql

2.kill -9 3213

3.尝试再次启动，并通过ps -ef|grep mysql命令查看进程状态