Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to l

发布时间：2020-12-12 01:05:24 所属栏目：MySql教程来源：网络整理

导读：《Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to local MySQL server through socket》要点：本文介绍了Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to local MySQL server through socket，希望对您有用。如果有疑问，可以联系我们。

《Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to local MySQL server through socket》要点：
本文介绍了Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to local MySQL server through socket，希望对您有用。如果有疑问，可以联系我们。

在安装好了MySQL之后,使用了新的配置文件后,MySQL服务器可以成功启动,但在登陆的时候出现了ERROR 2002 (HY000): Can't connect to local MySQL server through socket,即无法通过socket连接到mysql服务器,同时提供了socket文件的位置.下面是这个问题的描述与解决办法.MYSQL实例

1、故障现象MYSQL实例

代码如下:
[root@SZDB mysqldata]# mysql -uroot -p123456
Warning: Using a password on the command line interface can be insecure.
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/data/mysqldata/mysql.sock' (111)
#故障环境
[root@SZDB mysqldata]# more /etc/issue
CentOS release 5.9 (Final)
Kernel r on an m

2、故障分析MYSQL实例

代码如下:
#查看mysql实例的状态
[root@SZDB mysqldata]# netstat -ntlp? | grep 3306
tcp??????? 0????? 0 :::3306???????????????????? :::*??????????????????????? LISTEN????? 13001/mysqld
#查看my.cnf关于socket的配置
[root@SZDB mysqldata]# more /etc/my.cnf |grep sock
socket = /tmp/mysql.sock
#由上可知my.cnf中定义的为/tmp目录下,而错误提示为/data/mysqldata/目录下
#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@SZDB mysqldata]# 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

3、解决故障MYSQL实例

a、通过配置my.cnf mysql选项socket文件位置解决MYSQL实例

代码如下:
#先停止mysql服务器
[root@SZDB mysqldata]# service mysqld stop
Shutting down MySQL.[? OK? ]
#修改my.cnf,如下
[root@SZDB mysqldata]# vi /etc/my.cnf
[mysql]
no-auto-rehash
socket = /tmp/mysql.sock? #添加该行
#重启mysql服务器
[root@SZDB mysqldata]# service mysqld start
Starting MySQL..[? OK? ]
#再次连接正常
[root@SZDB mysqldata]# 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MYSQL实例

代码如下:
[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 |
+---------------+-----------------+

（编辑：李大同）

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Mysql应用MySQL错误ERROR 2002 (HY000): Can&#39;t connect to l

Mysql应用MySQL错误ERROR 2002 (HY000): Can't connect to l