黄瓜测试失败,"流关闭(IOError)"

我们目前正在将我们的Rails应用程序升级到Rails 4.在3.2中,我们的Cucumber(1.3.17)测试运行良好(如果可悲的缓慢),与Capybara(2.4.4),Poltergeist(1.5.1)和PhantomJS(1.9. 8)引擎盖下.

但是在4.0.12和4.1.8中,我们stream closed (IOError)在运行中得到一个随机点:

stream closed (IOError)
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/formatter/pretty.rb:156:in `write'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/formatter/pretty.rb:156:in `puts'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/formatter/pretty.rb:156:in `step_name'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:181:in `block in send_to_all'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:179:in `each'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:179:in `send_to_all'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:173:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:119:in `visit_step_name'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:112:in `block in visit_step_result'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:111:in `visit_step_result'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/step_invocation.rb:43:in `visit_step_result'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/step_invocation.rb:39:in `accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:106:in `block in visit_step'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:105:in `visit_step'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/step_collection.rb:19:in `block in accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/step_collection.rb:18:in `each'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/step_collection.rb:18:in `accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:100:in `block in visit_steps'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:99:in `visit_steps'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:15:in `block in execute'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:83:in `block (2 levels) in with_hooks'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:99:in `before_and_after'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:82:in `block in with_hooks'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime/support_code.rb:120:in `call'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime/support_code.rb:120:in `block (3 levels) in around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/language_support/language_methods.rb:9:in `block in around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/language_support/language_methods.rb:97:in `call'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/language_support/language_methods.rb:97:in `execute_around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/language_support/language_methods.rb:8:in `around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime/support_code.rb:119:in `block (2 levels) in around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime/support_code.rb:123:in `call'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime/support_code.rb:123:in `around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:94:in `around'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:81:in `with_hooks'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:13:in `execute'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/scenario.rb:32:in `block in accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/scenario.rb:79:in `with_visitor'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/scenario.rb:31:in `accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:58:in `block in visit_feature_element'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:57:in `visit_feature_element'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/feature.rb:38:in `block in accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/feature.rb:37:in `each'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/feature.rb:37:in `accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:27:in `block in visit_feature'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:26:in `visit_feature'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/features.rb:28:in `block in accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/features.rb:17:in `each'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/features.rb:17:in `each'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/features.rb:27:in `accept'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:21:in `block in visit_features'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:170:in `broadcast'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/ast/tree_walker.rb:20:in `visit_features'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/runtime.rb:49:in `run!'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/lib/cucumber/cli/main.rb:47:in `execute!'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/gems/cucumber-1.3.17/bin/cucumber:13:in `'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/bin/cucumber:23:in `load'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/bin/cucumber:23:in `'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/bin/ruby_executable_hooks:15:in `eval'
/var/lib/jenkins/.rvm/gems/ruby-2.1.5@tallama-integration/bin/ruby_executable_hooks:15:in `'

此错误是不一样的closed stream错误,这意味着你试图去触摸流,它已经关闭了.

不,唯一的一次stream closed (IOError)是在所有的MRI中投入了rb_thread_fd_close.该代码反过来只调用rb_io_close- 也就是在关闭文件描述符时; 它遍历其他活动线程并查看其中是否有任何一个正在等待关闭的文件描述符.如果有人在等待,则会stream closed在等待线程中引发错误.这巧妙地解释了为什么堆栈跟踪指向黄瓜:这是等待从格式化程序写到STDOUT的线程.但我们没有关于谁关闭文件描述符的任何信息.

因为我知道我在这里处理线程,所以我开始怀疑超时是在它不应该被杀的时候,但是我无法知道是什么timeout导致了这个混乱; 我删除了我的代码中的那个,但后来在我们正在使用的各种宝石中找到了35个,问题仍然存在.

我们还怀疑,在某些时候,由于内存不足,其中一个幻像进程被杀死了,我们puts在每个场景之前为当前进程的内存添加了工具......并且IOErrors消失了,几乎可以肯定是因为时序问题.当我删除检测时,错误返回.

我也尝试更新到树顶黄瓜和水豚,但似乎没有任何区别.

是否有一些聪明的方法来追踪我尚未尝试过的？你有没有看到这个问题并且知道我需要改进的单线配置改变？你有一个方便的补丁,可以timeout从所有Ruby 中删除吗？