[mysql2 error] mysql client is not connected

whjwssy2017 — Tue, 17 Apr 2018 12:49:31 +0800

Mysql2::Error (MySQL client is not connected): /home/work/ruby/lib/ruby/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:168:in escape' /home/work/ruby/lib/ruby/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:168:inquote_string' /home/work/ruby/lib/ruby/gems/1.8/gems/activerecord-mysql2-adapter-0.0.3/lib/active_record/connection_adapters/mysql2_adapter.rb:155:in quote' app/models/issue.rb:3554:inasync_svn_package' app/controllers/issues_controller.rb:550:in svn_pack' app/controllers/issues_controller.rb:526:insvn_pack' passenger (3.0.19) lib/phusion_passenger/rack/request_handler.rb:96:in process_request' passenger (3.0.19) lib/phusion_passenger/abstract_request_handler.rb:516:inaccept_and_process_next_request' passenger (3.0.19) lib/phusion_passenger/abstract_request_handler.rb:274:in main_loop' passenger (3.0.19) lib/phusion_passenger/rack/application_spawner.rb:206:instart_request_handler' passenger (3.0.19) lib/phusion_passenger/rack/application_spawner.rb:171:in send' passenger (3.0.19) lib/phusion_passenger/rack/application_spawner.rb:171:inhandle_spawn_application' passenger (3.0.19) lib/phusion_passenger/utils.rb:470:in safe_fork' passenger (3.0.19) lib/phusion_passenger/rack/application_spawner.rb:166:inhandle_spawn_application' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:357:in __send__' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:357:inserver_main_loop' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:206:in start_synchronously' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:180:instart' passenger (3.0.19) lib/phusion_passenger/rack/application_spawner.rb:129:in start' passenger (3.0.19) lib/phusion_passenger/spawn_manager.rb:253:inspawn_rack_application' passenger (3.0.19) lib/phusion_passenger/abstract_server_collection.rb:132:in lookup_or_add' passenger (3.0.19) lib/phusion_passenger/spawn_manager.rb:246:inspawn_rack_application' passenger (3.0.19) lib/phusion_passenger/abstract_server_collection.rb:82:in synchronize' passenger (3.0.19) lib/phusion_passenger/abstract_server_collection.rb:79:insynchronize' passenger (3.0.19) lib/phusion_passenger/spawn_manager.rb:244:in spawn_rack_application' passenger (3.0.19) lib/phusion_passenger/spawn_manager.rb:137:inspawn_application' passenger (3.0.19) lib/phusion_passenger/spawn_manager.rb:275:in handle_spawn_application' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:357:insend' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:357:in server_main_loop' passenger (3.0.19) lib/phusion_passenger/abstract_server.rb:206:instart_synchronously' passenger (3.0.19) helper-scripts/passenger-spawn-server:99

Rendering /home/work/oem/redmine_git/public/500.html (500 Internal Server Error) rendering section "request" rendering section "session" rendering section "environment" rendering section "backtrace"

问题背景：我执行打包任务，打包时间过长，大约 9 分钟，然后 production 的日志记录显示 mysql2 error 上述问题，我怎样解决呢？

gem install mysql2 报错

whjwssy2017 — Wed, 13 Dec 2017 16:03:40 +0800

查了些资料，还是找不到原因或者我有 mysql2 的下载网址吗？我下载之后 gem install xxx.gem 这种？求大神指教

Rails 连接 MySQL 数据库问题

whjwssy2017 — Wed, 13 Dec 2017 11:19:09 +0800

近日，维护一个 ror 框架搭建的网站。有时页面访问会出现 internal error（redmine 500）的错误。正常情况，刷新一下，页面就正常了，有时刷新也不行，一直处于加载状态，只能重启 apache。报错日志显示：连接被重置

（报错报到了 ruby-mysql.gem 里面的 write 函数，显示在 sock.flush 的时候超时）

mysql 数据库不在本地，连接的是远程云数据库

数据库的 wait_timeout 值为 400s，write_timeout 为 60s vendor 文件夹里面的连接池 size 是 5，连接池的 wait_timeout 是 5s，mysql 数据库驱动安装的是 mysql-2.8.1gem(没有用 mysql2) 造成以上原因是因为 socket 超时断掉了，链接失效，但客户端仍发起请求就报 500 了吗？可以通过修改 socket 连接机制修复吗？我在代码里看到数据库配置有 reconnet 属性，默认为 false，我在 database.yml 里面配置，设为 true 也不行。vendor 文件夹里面 rails 的东西，ruby-mysql 也不敢改. ruby 版本是 1.8.7 的，rails 是 2.3.5，老网站，版本非常旧。

希望有大神指点迷津＝＝困扰好久的问题

whjwssy2017 (这么多年)

[mysql2 error] mysql client is not connected

gem install mysql2 报错

Rails 连接 MySQL 数据库问题