Rails 3 +守护进程gem：查询模型时出现exception
作为我的rails项目的一部分，我们将使用守护进程作为消息队列侦听器来执行来自Rails RESTful Web服务前端的命令。
为了便于原型设计，我们使用Daemons gem创建一个非常简单的守护进程。 现在，它非常简单。 这是代码：
require 'rubygems' require 'daemons' require File.expand_path('../../config/environment', __FILE__) Daemons.run_proc('aeon_server') do loop do empires = Empire.all sleep(5) end end 基本上，它需要守护进程的东西，然后需要我的Ruby环境，然后启动到守护进程。 守护程序只是尝试查询Empires表中的所有内容。 然后它会睡觉并再次进行。
当它执行’all’时，我得到以下exception：
C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:109:in `write': closed stream (IOError) from C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:109:in `block in flush' from :10:in `synchronize' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:102:in `flush' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:126:in `auto_flush' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:67:in `add' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.7/lib/active_support/buffered_logger.rb:78:in `debug' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract_adapter.rb:206:in `rescue in log' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract_adapter.rb:199:in `log' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/sqlite_adapter.rb:135:in `execute' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/sqlite_adapter.rb:284:in `select' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/connection_adapters/abstract/query_cache.rb:56:in `select_all' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/base.rb:468:in `find_by_sql' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/relation.rb:64:in `to_a' from C:/Ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.7/lib/active_record/relation/finder_methods.rb:143:in `all' from C:in `all' from script/aeon_server_control.rb:9:in `block (2 levels) in ' from script/aeon_server_control.rb:7:in `loop' from script/aeon_server_control.rb:7:in `block in ' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/application.rb:249:in `call' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/application.rb:249:in `block in start_proc' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/application.rb:260:in `call' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/application.rb:260:in `start_proc' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/application.rb:293:in `start' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/controller.rb:73:in `run' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons.rb:195:in `block in run_proc' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/cmdline.rb:109:in `call' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons/cmdline.rb:109:in `catch_exceptions' from C:/Ruby/lib/ruby/gems/1.9.1/gems/daemons-1.1.3/lib/daemons.rb:194:in `run_proc' from script/aeon_server_control.rb:6:in `'
知道为什么ActiveSupport会抛出这个exception吗？ 除了需要环境之外，我还需要将我的rails环境“引导”到守护进程中吗？
当进程分叉/生成/无论它在Windows上调用时，文件描述符都有一些复杂性。
使用Rails.logger = ActiveSupport :: BufferedLogger.new（’/ path / to / log’）执行Daemons.run_proc（’aeon_server’）后尝试重新实例化记录器