时间：2020-10-21 11:15:15 | 栏目：Mysql | 点击：次
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