Remote WebDriver UnreachableBrowserException: Could not start a new session

问题

I got this exception for all browsers. For example, I create a remote webdriver on chrome like this:

caps = DesiredCapabilities.chrome();
ChromeOptions options = new ChromeOptions();
options.addArguments("disable-infobars");
caps.setCapability(ChromeOptions.CAPABILITY, options);
webDriver = new RemoteWebDriver(new URL("http://myIP:5555/wd/hub"), caps);

And I got UnreachableBrowserException as follow:

org.openqa.selenium.remote.DesiredCapabilities chrome
INFO: Using `new ChromeOptions()` is preferred to `DesiredCapabilities.chrome()`

org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.

But I check my selenium hub at http://myIP:4444/grid/console, everything is fine, the node is stil registered. I then check my node at http://myIP:5555/wd/hub/static/resource/hub.html, I still can click "Create Session" to create a session for all browsers.

I just got this exception today, it still worked few days ago. I am using Selenium 3.11.0, IntelliJ 2017.3, all drivers and browsers are latest versions.

I googled here, but I can't find a solution for this while my gird is still running. Any help much appreciated.

回答1:

The error says it all :

INFO: Using `new ChromeOptions()` is preferred to `DesiredCapabilities.chrome()`

The current implementation of Selenium while invoking RemoteWebDriver supports the ChromeOptions and you can use the following code block :

ChromeOptions options = new ChromeOptions();
options.addArguments("disable-infobars");
webDriver = new RemoteWebDriver(new URL("http://myIP:5555/wd/hub"), options);

Update

As per your comment update the documentation at seleniumhq-documentation is yet to be updated. Here are the relevant bytes from the Selenium Release Notes :

Selenium v3.5.0 :

* Start making *Option classes instances of Capabilities. This allows
  the user to do:
  `WebDriver driver = new RemoteWebDriver(new InternetExplorerOptions());`

Selenium v3.6.0 :

* All `*Option` classes now extend `MutableCapbilities`
  `new RemoteWebDriver(new ChromeOptions());`

Selenium v3.7.0 :

* Migrated from using `DesiredCapabilities` to either
  `MutableCapabilities` or (preferably) `ImmutableCapabilities`.

来源：https://stackoverflow.com/questions/49492697/remote-webdriver-unreachablebrowserexception-could-not-start-a-new-session

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selenium-webdriver

webdriver

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remotewebdriver