title: "No such session" / "chrome not reachable" error when running Chrome in parallel in Jenkins
body: <p><br>
  I am getting the issue with running automation tests on Chrome in Jenkins using parallel_test gem (also use with Capybara, selenium - Ruby language). I'm running it in headless mode with Xvfb. However, most of all test scenarios failed due to 'no such session' or 'chrome not reachable' errors.<br>
  This is my run command on test job in Jenkins: </p>
  
  <pre><code>xvfb-run -a --server-args='-screen 0 1680x1050x24' bundle exec parallel_cucumber features/ -n 4 -o '-t ~@ignore -p jenkins_chrome'
  </code></pre>
  
  <p>This is my register_driver in env.rb:</p>
  
  <pre><code>Capybara.register_driver :chrome do |app|
      Capybara::Selenium::Driver.new(app,
           browser: :chrome,
           desired_capabilities: {
               "chromeOptions" =&gt; {
                   "args" =&gt; %w{ --start-maximized --disable-impl-side-painting --no-sandbox }
               }
           })
    end
  </code></pre>
  
  <p>And this is error message:</p>
  
  <pre><code>(Driver info: chromedriver=2.20.353124 (035346203162d32c80f1dce587c8154a1efa0c3b),platform=Linux 4.0.5 x86_64) (Selenium::WebDriver::Error::NoSuchDriverError)
  ./features/step_definitions/view_a_profile.rb:204:in `/^user has signed in as "([^"]*)"$/'
  </code></pre>
  
  <p>Someone said the errors are due to xvfb, some said due to Chrome can't run in parallel.<br>
  Have anyone experienced this issue? How can I solve this problem?</p>