Arvados

Function available_port() at app/workbench/test/integration_helper.rb file is used to get a random available port for different services used in the integration tests.

In the case of Selenium, it also tries to use the port number before the one returned by this function, for locking purposes.

It seems that when this locking port is being used by some other process, every selenium test wait for 45 seconds before getting a timeout, and as a result the overall testing time goes up really fast.

Here's an example of the error message:

Error:
WebsocketTest#test_test_live_logging_scrolling_container_requests:
Selenium::WebDriver::Error::WebDriverError: unable to bind to locking port 33354 within 45 seconds
    test/integration_helper.rb:183:in `screenshot'
    test/integration_helper.rb:194:in `block in <class:IntegrationTest>'
    test/test_helper.rb:307:in `after_teardown'
    test/test_helper.rb:297:in `run'

As an additional data point, I noticed that not all selenium tests gave this error, so maybe the problem has to do with the subject discussed here: http://stackoverflow.com/a/33483845