Ruby Selenium Net::ReadTimeout

Question

I'm running automated tests using Ruby/Cucumber/Capybara/Chromedriver. The automated tests are running by jenkins. Strange thing is that sometimes the browser opens up, but with a black screen and i got Net::ReadTimeout, and the browser not closing, so taking up my Memory. What i would like to achieve is, that if this occurs the browser with black screen must be closed. Any suggestions? Here's the error i got in jenkins:

    Net::ReadTimeout (Net::ReadTimeout)
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/protocol.rb:176:in `rbuf_fill'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/protocol.rb:154:in `readuntil'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/protocol.rb:164:in `readline'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http/response.rb:40:in `read_status_line'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http/response.rb:29:in `read_new'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1446:in `block in transport_request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1443:in `catch'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1443:in `transport_request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1416:in `request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1409:in `block in request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:877:in `start'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:1407:in `request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/default.rb:124:in `response_for'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/default.rb:78:in `request'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/http/common.rb:63:in `call'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/bridge.rb:645:in `raw_execute'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/bridge.rb:109:in `create_session'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/remote/bridge.rb:69:in `initialize'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/chrome/bridge.rb:42:in `initialize'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/common/driver.rb:61:in `new'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver/common/driver.rb:61:in `for'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/selenium-webdriver-3.0.5/lib/selenium/webdriver.rb:82:in `for'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/capybara-2.11.0/lib/capybara/selenium/driver.rb:22:in `browser'
/var/lib/jenkins/workspace/autotest/features/support/env.rb:12:in `<top (required)>'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/rb_support/rb_language.rb:96:in `load'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/rb_support/rb_language.rb:96:in `load_code_file'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime/support_code.rb:142:in `load_file'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime/support_code.rb:84:in `block in load_files!'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime/support_code.rb:83:in `each'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime/support_code.rb:83:in `load_files!'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime.rb:253:in `load_step_definitions'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/runtime.rb:61:in `run!'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/lib/cucumber/cli/main.rb:32:in `execute!'
/var/lib/jenkins/.rbenv/versions/2.4.0/lib/ruby/gems/2.4.0/gems/cucumber-2.4.0/bin/cucumber:8:in `<top (required)>'
/var/lib/jenkins/.rbenv/versions/2.4.0/bin/cucumber:22:in `load'
/var/lib/jenkins/.rbenv/versions/2.4.0/bin/cucumber:22:in `<main>'

make sure to start the selenium session only when the application is properly started. — phoet
– phoet, Commented Jan 6, 2017 at 13:03
We are running into this same issue. On ubuntu 14.04 with all the dependencies installed and chrome can be started up in a terminal via xvfb. But when I start it up via ruby (selenium in our case) it just times out with the same stack trace in this question. So far have not found a solution — Shyam Habarakada
– Shyam Habarakada, Commented Mar 4, 2017 at 1:16
I resolved the Net::ReadTimeout error by identifying that it occurred during email sending functionality not working. When I added the correct smtp it worked for me properly. — Developer Nilesh
– Developer Nilesh, Commented Feb 21 at 8:36

scilence · Accepted Answer · 2020-02-10 20:15:30Z

0

Trace where, exactly, this error is coming from in your code, then

begin
    <driver execution code>
rescue Net::ReadTimeout
    @driver.quit
end

This should catch the error and close the session as you desire.

What I've done, is write a separate method to handle errors

def rescue_exceptions
    begin
        yield
    rescue Selenium::WebDriver::Error::NoSuchElementError,
            Selenium::WebDriver::Error::UnknownError,
            Selenium::WebDriver::Error::StaleElementReferenceError,
            Selenium::WebDriver::Error::ElementNotInteractableError
        <Handle Errors Here>
    end
end

Then this method can be wrapped around other code that may cause issues

def SignIn
    rescue_exceptions {
        <Perform Actions Here>
    }
end

answered Feb 10, 2020 at 20:15

scilence

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