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

I ran into the same issue running Chrome via Behat/Mink and Selenium in a Docker container. After some fiddling, I arrived at the following behat.yml which supplies the switches mentioned above. Note that all of them were required for me to get it running successfully.

default:
    extensions:
        Behat\MinkExtension:
            base_url: https://my.app/
            default_session: selenium2
            selenium2:
                browser: chrome
                capabilities:
                    extra_capabilities:
                        chromeOptions:
                            args:
                                - "headless"
                                - "no-sandbox"
                                - "disable-dev-shm-usage"

Answer 2

It happens when chromedriver fails to figure out what debugging port chrome is using.

One possible cause is an open defect with HKEY_CURRENT_USER\Software\Policies\Google\Chrome\UserDataDir

But in my last case, it was some other unidentified cause.

Fortunately setting port number manually worked:

final String[] args = { "--remote-debugging-port=9222" };
options.addArguments(args);
WebDriver driver = new ChromeDriver(options);

Answer 3

Wrong port number in my case. Check if port number when starting Selenium server is the same as in your script.

Answer 4

I solve this problem by installing yum -y install gtk3-devel gtk3-devel-docs", it works ok

My work env is :

Selenium Version 3.12.0
ChromeDriver Version v2.40
Chrome 68 level

Before:

After:

Answer 5

Update:

I am able to get through the issue and now I am able to access the chrome with desired url.

Results of trying the provided solutions:

I tried all the settings as provided above but I was unable to resolve the issue

Explanation regarding the issue:

As per my observation DevToolsActivePort file doesn't exist is caused when chrome is unable to find its reference in scoped_dirXXXXX folder.

Steps taken to solve the issue

1. I have killed all the chrome processes and chrome driver processes.

2. Added the below code to invoke the chrome

   System.setProperty("webdriver.chrome.driver","pathto\\chromedriver.exe");    
   ChromeOptions options = new ChromeOptions();
   options.setExperimentalOption("useAutomationExtension", false);
   WebDriver driver = new ChromeDriver(options);
   driver.get(url);
   

Using the above steps I was able to resolve the issue.

Thanks for your answers.

Answer 6

I also faced this issue while integrating with jenkins server, I was used the root user for jenkin job, the issue was fixed when I changed the user to other user. I am not sure why this error occurs for the root user.

• Google Chrome Version 71.0
• ChromeDriver Version 2.45
• CentOS7 Version 1.153