WebDriverException: unknown error: DevToolsActivePort file doesn't exist while trying to initiate Chrome Browser

Question

I am trying to launch chrome with an URL, the browser launches and it does nothing after that.

I am seeing the below error after 1 minute:

Unable to         


        

Answer 1

In my case it happened when I've tried to use my default user profile:

...
options.addArguments("user-data-dir=D:\\MyHomeDirectory\\Google\\Chrome\\User Data");
...

This triggered chrome to reuse processes already running in background, in such a way, that process started by chromedriver.exe was simply ended.

Resolution: kill all chrome.exe processes running in background.