启动mysql时报如下错误

[root@VM_26_56_centos data]# service mysqld start
Starting MySQL.. ERROR! The server quit without updating PID file (/usr/local/mysql/data/VM_26_56_centos.pid).

查看日志显示

2017-03-14 15:49:28 27467 [Note] Server hostname (bind-address): '*'; port: 3306
2017-03-14 15:49:28 27467 [Note] IPv6 is not available.
2017-03-14 15:49:28 27467 [Note]   - '0.0.0.0' resolves to '0.0.0.0';
2017-03-14 15:49:28 27467 [Note] Server socket created on IP: '0.0.0.0'.
2017-03-14 15:49:28 27467 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
2017-03-14 15:49:28 27467 [ERROR] Do you already have another mysqld server running on port: 3306 ?
2017-03-14 15:49:28 27467 [ERROR] Aborting

查看端口和进程

[root@VM_26_56_centos data]# netstat -tulnp | grep 3306
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      23115/mysqld
[root@VM_26_56_centos data]# ps aux | grep 23115
root     17317  0.0  0.0 103252   892 pts/0    S+   10:58   0:00 grep 23115
mysql    23115  0.0  1.6 3337908 540464 ?      Sl   Feb22  22:20 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/usr/local/mysql/data/VM_26_56_centos.err --pid-file=/usr/local/mysql/data/VM_26_56_centos.pid
[root@VM_26_56_centos data]#

kill掉再次启动

[root@VM_26_56_centos local]# ps aux | grep 23115
root     17434  0.0  0.0 103252   892 pts/0    S+   11:00   0:00 grep 23115
[root@VM_26_56_centos local]# service mysqld start
Starting MySQL. SUCCESS!