selenium-chromedriver - Chromedriver/Capybara 打开的文件太多 - 用于 "127.0.0.1"端口 9518 的套接字(2)

Question

当 capybara 选择器格式错误或找不到时，我收到此错误(详情如下)。

自从我们最近升级到最新的驱动程序以来，我认为这是新的。

触发此命令的命令:
find('.panel.#synopsis .btn', text: /new email/i)
之前出现这样的错误sudo lsof -i :9518返回 6 个项目，之后似乎有数百个。

错误:

 Failure/Error: TCPSocket.open(conn_addr, conn_port, @local_host, @local_port)

 Errno::EMFILE:
   Failed to open TCP connection to 127.0.0.1:9518 (Too many open files - socket(2) for "127.0.0.1" port 9518)
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:960:in `initialize'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:960:in `open'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:960:in `block in connect'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/timeout.rb:78:in `timeout'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:958:in `connect'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:943:in `do_start'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/webmock-3.7.6/lib/webmock/http_lib_adapters/net_http.rb:136:in `start_with_connect_without_finish'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/webmock-3.7.6/lib/webmock/http_lib_adapters/net_http.rb:104:in `request'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/http/default.rb:129:in `response_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/http/default.rb:82:in `request'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/http/common.rb:64:in `call'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/bridge.rb:167:in `execute'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/w3c/bridge.rb:567:in `execute'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/remote/w3c/bridge.rb:173:in `window_handles'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/common/driver.rb:187:in `window_handles'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara/selenium/driver.rb:208:in `window_handles'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara/selenium/driver_specializations/chrome_driver.rb:43:in `reset!'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara/session.rb:130:in `reset!'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara.rb:322:in `block in reset_sessions!'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara.rb:322:in `reverse_each'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara.rb:322:in `reset_sessions!'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/capybara-3.30.0/lib/capybara/rspec.rb:18:in `block (2 levels) in <top (required)>'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:450:in `instance_exec'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:450:in `instance_exec'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:363:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:515:in `block in run_owned_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:514:in `each'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:514:in `run_owned_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:601:in `block in run_example_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:600:in `each'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:600:in `run_example_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:471:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:510:in `run_after_example'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:276:in `block in run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:503:in `block in with_around_and_singleton_context_hooks'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:460:in `block in with_around_example_hooks'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:472:in `block in run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:612:in `block in run_around_example_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:345:in `call'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-rails-3.9.0/lib/rspec/rails/adapters.rb:127:in `block (2 levels) in <module:MinitestLifecycleAdapter>'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:450:in `instance_exec'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:450:in `instance_exec'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:381:in `execute_with'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:614:in `block (2 levels) in run_around_example_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:345:in `call'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:615:in `run_around_example_hooks_for'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/hooks.rb:472:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:460:in `with_around_example_hooks'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:503:in `with_around_and_singleton_context_hooks'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example.rb:254:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:633:in `block in run_examples'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:629:in `map'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:629:in `run_examples'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:595:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `block in run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `map'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `block in run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `map'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/example_group.rb:596:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:121:in `block (3 levels) in run_specs'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:121:in `map'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:121:in `block (2 levels) in run_specs'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/configuration.rb:2031:in `with_suite_hooks'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:116:in `block in run_specs'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/reporter.rb:74:in `report'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:115:in `run_specs'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:89:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:71:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/lib/rspec/core/runner.rb:45:in `invoke'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/rspec-core-3.9.1/exe/rspec:4:in `<top (required)>'
 # /Users/myuser/.rbenv/versions/2.7.0/bin/rspec:23:in `load'
 # /Users/myuser/.rbenv/versions/2.7.0/bin/rspec:23:in `<top (required)>'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli/exec.rb:63:in `load'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli/exec.rb:63:in `kernel_load'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli/exec.rb:28:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli.rb:476:in `exec'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli.rb:30:in `dispatch'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/cli.rb:24:in `start'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/bundler-2.1.2/libexec/bundle:46:in `block in <top (required)>'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/bundler/friendly_errors.rb:123:in `with_friendly_errors'
 # /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/bundler-2.1.2/libexec/bundle:34:in `<top (required)>'
 # /Users/myuser/.rbenv/versions/2.7.0/bin/bundle:23:in `load'
 # /Users/myuser/.rbenv/versions/2.7.0/bin/bundle:23:in `<main>'
 # 
 #   Showing full backtrace because every line was filtered out.
 #   See docs for RSpec::Configuration#backtrace_exclusion_patterns and
 #   RSpec::Configuration#backtrace_inclusion_patterns for more information.
 # ------------------
 # --- Caused by: ---
 # Errno::EMFILE:
 #   Too many open files - socket(2) for "127.0.0.1" port 9518
 #   /Users/myuser/.rbenv/versions/2.7.0/lib/ruby/2.7.0/net/http.rb:960:in `initialize'

Answer 1

自从升级到 ruby 2.7 以来，我一直收到与 Capybara 功能规范相同的错误消息，它本身与打开的文件无关。当 Capybara 错过了一个选择器(在你的情况下，可能是 find('.panel.#synopsis .btn', text: /new email/i) )，它会抛出一个 socket(2)太多文件错误。