我有一个场景，
我每天 12 点在服务器上收集在线设备/单元。为此，我在控制器中编写了工作。目前我使用.at方法进行测试。这是我的控制器代码
require 'rubygems'
require 'rufus/scheduler'
require 'net/ssh'
require 'fileutils'
require "time"
require "date"
scheduler = Rufus::Scheduler.new
scheduler.at '2014/05/09 9:35:00' do
autoupdates = AutoupdatesController.new
autoupdates.get_all_online_units
end
class AutoupdatesController < ApplicationController
def get_all_online_units
# logic for getting online units
end
end
调度程序运行良好，但它断开了我的数据库连接。我还检查了我是否只是在那个时候初始化调度程序对象，它也在刹车。它给出了无法连接到 MySQL 服务器错误。重新启动服务器后，它工作正常。
为此，我正在使用rails 3.2.11, ruby 1.8.7 and rufus-scheduler 3.0.7
如何解决此问题。
编辑
现在我在config/initializer/task_scheduler.rb. 这是我的文件内容
require 'rubygems'
require 'rufus/scheduler'
require 'net/ssh'
require 'fileutils'
require "time"
require "date"
scheduler = Rufus::Scheduler.new
scheduler.at '2014/05/08 1:25:00' do
Rails.logger.info("#-----------In the config/initializer/task_scheduler.rb-----------#")
end
然后在启动服务器后它给了我同样类型的错误
=> Booting Thin
=> Rails 3.2.11 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/var/lib/gems/1.8/gems/mysql2-0.3.14/lib/mysql2/client.rb:67:in `connect': Can't connect to MySQL server on 'XXXXXXXXXXXXXXXXXXX.com' (4) (Mysql2::Error)
from /var/lib/gems/1.8/gems/mysql2-0.3.14/lib/mysql2/client.rb:67:in `initialize'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `new'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/mysql2_adapter.rb:16:in `mysql2_connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `send'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:315:in `new_connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:325:in `checkout_new_connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:247:in `checkout'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `checkout'
from /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `connection'
from /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/model_schema.rb:308:in `clear_cache!'
from /var/lib/gems/1.8/gems/activerecord-3.2.11/lib/active_record/railtie.rb:97:in `_callback_before_3'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:418:in `_run__321316982__prepare__4__callbacks'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `send'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:405:in `__run_callback'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:385:in `_run_prepare_callbacks'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:81:in `send'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/callbacks.rb:81:in `run_callbacks'
from /var/lib/gems/1.8/gems/actionpack-3.2.11/lib/action_dispatch/middleware/reloader.rb:74:in `prepare!'
from /var/lib/gems/1.8/gems/actionpack-3.2.11/lib/action_dispatch/middleware/reloader.rb:48:in `prepare!'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/application/finisher.rb:47
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/initializable.rb:30:in `instance_exec'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/initializable.rb:30:in `run'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/initializable.rb:55:in `run_initializers'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/initializable.rb:54:in `each'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/initializable.rb:54:in `run_initializers'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/application.rb:136:in `initialize!'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/railtie/configurable.rb:30:in `send'
from /var/lib/gems/1.8/gems/railties-3.2.11/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/pdcadmin/deploy/pdc-dashboard/config/environment.rb:5
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:236:in `load_dependency'
from /var/lib/gems/1.8/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /home/pdcadmin/deploy/pdc-dashboard/config.ru:3
from /var/lib/gems/1.8/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
from /var/lib/gems/1.8/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
from /home/pdcadmin/deploy/pdc-dashboard/config.ru:0:in `new'
from /home/pdcadmin/deploy/pdc-dashboard/config.ru:0
然后我注释了 task_scheduler.rb 文件中的一些行 这是那个文件
require 'rubygems'
require 'rufus/scheduler'
require 'net/ssh'
require 'fileutils'
require "time"
require "date"
=begin
scheduler = Rufus::Scheduler.new
scheduler.at '2014/05/08 1:25:00' do
Rails.logger.info("#-----------In the config/initializer/task_scheduler.rb-----------#")
end
=end
并再次启动服务器它工作正常。
编辑 2这是我的 config.ru 文件
# This file is used by Rack-based servers to start the application.
require ::File.expand_path('../config/environment', __FILE__)
run MyApp::Application