Question

我有这种痕迹，不知道如何追查原因。这是在测试运行期间弹出的。关于如何进行的任何想法？

DEPRECATION WARNING: Database connections will not be closed automatically, please close your
database connection at the end of the thread by calling `close` on your
connection.  For example: ActiveRecord::Base.connection.close
. (called from mon_synchronize at /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211)
/home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:212:in `block in clear_stale_cached_connections!'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:210:in `each'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:210:in `clear_stale_cached_connections!'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:274:in `block (2 levels) in checkout'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `loop'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:242:in `block in checkout'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:239:in `checkout'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:102:in `block in connection'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:101:in `connection'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:410:in `retrieve_connection'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:171:in `retrieve_connection'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_specification.rb:145:in `connection'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/query_cache.rb:61:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activerecord-3.2.9/lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/callbacks.rb:405:in `_run__1441209721629762293__call__222931449678172199__callbacks'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/callbacks.rb:405:in `__run_callback'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/callbacks.rb:81:in `run_callbacks'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/rack/logger.rb:32:in `call_app'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/rack/logger.rb:16:in `block in call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/tagged_logging.rb:22:in `tagged'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/rack/logger.rb:16:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/request_id.rb:22:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/methodoverride.rb:21:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/runtime.rb:17:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.9/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/lock.rb:15:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.9/lib/action_dispatch/middleware/static.rb:62:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/airbrake-3.1.6/lib/airbrake/rack.rb:41:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/airbrake-3.1.6/lib/airbrake/user_informer.rb:12:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/engine.rb:479:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:223:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/builder.rb:134:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:64:in `block in call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:49:in `each'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/urlmap.rb:49:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/capybara-1.1.3/lib/capybara/server.rb:17:in `call'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler/webrick.rb:59:in `service'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
  /home/gaul/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

Answer 1

工作解决方案是：

after do
  ActiveRecord::Base.connection.close
end

您可以查看此问题

ActiveRecord connection warning. (Database connections will not be closed automatically)

Answer 2

不确定这是否是解决此问题的任何人的解决方案，但我相信我已经在我自己的应用中找到了它。

场景：虽然测试正在通过，但某些功能测试（使用rspec和capybara）会导致出现此警告。

问题：测试正在加载一个页面，然后使用ajax调用控制器，并使用一些部分render_to_string进行渲染。其中一个部分是抛出一个错误，但测试只是寻找其他东西的外观，这不是那部分的一部分。所以测试通过了。

我们需要对这种特殊方法进行更好的测试，而且它应该做更少的事情。但这是我的问题的原因，我只是通过在运行测试时拖尾test.log来看到它。

Answer 3

我遇到与Dominik相同的问题，但我无法解决它。

以下是一些想法：

首先，我没有在我的代码中使用任何线程。
我责备VanityUrls，因为一旦页面加载，我一直在寻找log / test.log，并且有一堆图像调用属于虚荣路线。我的猜测是每个请求产生一个线程？我没有任何论据来证实这种情况正在发生。
考虑到这一点，我摆脱了一些图像和一些工作。我一直收到数据库警告，但以下测试工作正常。过去，以下测试会失败，因为AR无法为测试生成新连接：（
我认为这是New Relic，Capybara，Capybara Webkit，AirBrake。我更新了那些。仍然收到警告。
不知道还能做什么。

寻找：DEPRECATION警告：数据库连接不会自动关闭

3 个答案: