RoR+Mysql (Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql2::Error)答案

【问题标题】：RoR+Mysql (Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql2::Error)RoR+Mysql (Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql2::Error)
【发布时间】：2017-04-24 05:03:29
【问题描述】：

ruby 2.2.3p173（2015-08-18 修订版 51636）[x86_64-linux]
Rails 5.0.0.1
服务器版本：5.7.13-0ubuntu0.16.04.2（Ubuntu）

数据库.yml

default: &default  
adapter: mysql2  
encoding: utf8  
pool: 5   
username: ****  
password: ****  
socket: /var/run/mysqld/mysqld.sock

当我打开带有实体的页面时效果很好，但是当我尝试添加新记录时出现错误：
Puma caught this error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (Mysql2::Error) /home/ruby/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mysql2-0.4.4/lib/mysql2/client.rb:87:in connect /home/ruby/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/mysql2-0.4.4/lib/mysql2/client.rb:87:in initialize

在我输入 rails server 命令后，它再次工作，直到我尝试添加新记录。我该如何修复这个错误？

【问题讨论】：

你好，mysqladmin -u root status的输出是什么？
mysqladmin -u root status -p 输入密码: Uptime: 10017 Threads: 1 Questions: 6 Slow queries: 0 Opens: 107 Flush tables: 1 Open tables: 26 Queries per second avg: 0.000跨度>
你尝试过stackoverflow.com/questions/5499035/…的建议吗？
首先，它没有帮助

标签： mysql ruby-on-rails

【解决方案1】：

这样就解决了：

ps -A|grep mysql

sudo pkill mysql

ps -A|grep mysqld

sudo pkill mysqld

sudo service mysql restart

【讨论】：