Mysql启动报ERROR：2002的分析与解决

前言

本文主要给大家介绍了关于mysql启动报error：2002的分析与解决，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

1、故障现象

[root@localhost scripts]# mysql -u root
error 2002 (hy000): can't connect to local mysql server through socket '/tmp/mysqld.sock' (2)

2、故障分析

查看mysql实例的状态

[root@localhost scripts]# netstat -ntlp | grep 3306
tcp 0 0 :::3306   :::*   listen 13001/mysqld

查看my.cnf关于socket的配置

[root@localhost scripts]# more /etc/my.cnf |grep sock
socket = /tmp/mysqld.sock

也就是说mysqld已经声称了正确的sock文件，但客户端连接还是从初始目录去找sock文件

下面查看后台日志，有个error，是关于满查询日志的，是由于目录不存在而产生的错误，与当前故障无关

[root@localhost scripts]# more szdb.err
  ............
2014-10-11 13:17:21 13001 [note] innodb: 5.6.12 started; log sequence number 1625997
/app/soft/mysql/bin/mysqld: file '/log/mysql_logs/slowquery.log' not found (errcode: 2 - no such file or directory)
2014-10-11 13:17:21 13001 [error] could not use /log/mysql_logs/slowquery.log for logging (error 2). turning logging off for the who
le duration of the mysql server process. to turn it on again: fix the cause, shutdown the mysql server and restart it.
2014-10-11 13:17:21 13001 [note] server hostname (bind-address): '*'; port: 3306
2014-10-11 13:17:21 13001 [note] ipv6 is available.
2014-10-11 13:17:21 13001 [note] - '::' resolves to '::';
2014-10-11 13:17:21 13001 [note] server socket created on ip: '::'.
2014-10-11 13:17:21 13001 [note] event scheduler: loaded 0 events
2014-10-11 13:17:21 13001 [note] /app/soft/mysql/bin/mysqld: ready for connections.
version: '5.6.12-log' socket: '/tmp/mysql.sock' port: 3306 source distribution
#author ：leshami
#blog : http://www.linuxidc.com

3、解决故障

a、通过配置my.cnf mysql选项socket文件位置解决

先停止mysql服务器

[root@localhost scripts]# systemvtl restart mysqld
shutting down mysql.[ ok ]

修改my.cnf，如下

[root@localhost scripts]# vi /etc/my.cnf
[mysql]
no-auto-rehash
socket = /tmp/mysqld.sock #添加该行

重启mysql服务器

[root@localhost scripts]# systemctl restart mysqld 
starting mysql..[ ok ]

再次连接正常

[root@localhost scripts]# mysql -uroot -p
enter password:
mysql> show variables like 'version';
+---------------+------------+
| variable_name | value |
+---------------+------------+
| version | 5.6.12-log |
+---------------+------------+

b、为socket文件建立链接方式

[root@szdb mysqldata]# ln -s /tmp/mysql.sock /data/mysqldata/mysql.sock
ln: creating symbolic link `/data/mysqldata/mysql.sock' to `/tmp/mysql.sock': file exists
[root@szdb mysqldata]# rm mysql.sock #上面提示文件存在，所以删除之前的mysql.sock文件
[root@szdb mysqldata]# ln -s /tmp/mysql.sock /data/mysqldata/mysql.sock
[root@szdb mysqldata]# ls -hltr mysql.sock
lrwxrwxrwx 1 root root 15 oct 11 14:00 mysql.sock -> /tmp/mysql.sock
[root@szdb mysqldata]# mysql -uroot -p
enter password:
mysql> show variables like 'socket';
+---------------+-----------------+
| variable_name | value  |
+---------------+-----------------+
| socket | /tmp/mysql.sock |
+---------------+-----------------+

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对的支持。