org.openqa.selenium.WebDriverException：未知错误：无法通过Java用ChromeDriver Chrome和Selenium集中元素

Question

I am learning Selenium, and I have Chrome version 61.0.3163.100 and ChromeDriver version 2.34.522940 . I tried this code:

public void adminLogin(){
        driver.findElement(By.name("userId")).sendKeys("sysadmin");
}

My page is getting loaded, but the username field is not getting populated with "sysadmin". This is the error I am getting:

Starting ChromeDriver 2.34.522940 (1a76f96f66e3ca7b8e57d503b4dd3bccfba87af1) on port 31275
  Only local connections are allowed.
  Feb 27, 2019 11:16:44 AM org.openqa.selenium.remote.ProtocolHandshake createSession
    INFO: Detected dialect: OSS
    Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: cannot focus element
      (Session info: chrome=61.0.3163.100)
      (Driver info: chromedriver=2.34.522940 (1a76f96f66e3ca7b8e57d503b4dd3bccfba87af1),platform=Windows NT 6.1.7601 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
    Command duration or timeout: 0 milliseconds
    Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
    System info: host: 'DWA7DEVOS00170', ip: '10.96.162.167', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_25'
    Driver info: org.openqa.selenium.chrome.ChromeDriver
    Capabilities {acceptSslCerts: true, applicationCacheEnabled: false, browserConnectionEnabled: false, browserName: chrome, chrome: {chromedriverVersion: 2.34.522940 (1a76f96f66e3ca..., userDataDir: C:\Users\rajos1\AppData\Loc...}, cssSelectorsEnabled: true, databaseEnabled: false, handlesAlerts: true, hasTouchScreen: false, javascriptEnabled: true, locationContextEnabled: true, mobileEmulationEnabled: false, nativeEvents: true, networkConnectionEnabled: false, pageLoadStrategy: normal, platform: XP, platformName: XP, rotatable: false, setWindowRect: true, takesHeapSnapshot: true, takesScreenshot: true, unexpectedAlertBehaviour: , unhandledPromptBehavior: , version: 61.0.3163.100, webStorageEnabled: true}
    Session ID: ff3cf91166eddfe1667f931b18ede2ea
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:214)
        at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:166)
        at org.openqa.selenium.remote.http.JsonHttpResponseCodec.reconstructValue(JsonHttpResponseCodec.java:40)
        at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:80)
        at org.openqa.selenium.remote.http.AbstractHttpResponseCodec.decode(AbstractHttpResponseCodec.java:44)
        at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:164)
        at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
        at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:279)
        at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:100)
        at pulse.tpr.LoginInterface.adminLogin(LoginInterface.java:24)
        at pulse.tpr.LoginInterface.main(LoginInterface.java:34)

Any help would be appreciated.

Answer 1

Try using Actions class to first focus on element before using sendkeys() as shown below:

Actions actions = new Actions(driver);
actions.moveToElement(driver.findElement(By.name("userId")));
actions.click();
actions.sendKeys("sysadmin");
actions.build().perform();

Answer 2

Faced similar issue. You are using an outdated version of chromedriver. Update the chromedriver to the latest version and set the webdriver property accordingly.

WebDriver browser = new ChromeDriver();
String path_to_driver = "C:\\blah\\blah\\chromedriver.exe"
System.setProperty("webdriver.chrome.driver", path_to_driver);

Next, you will be needing to upgrade your selenium library to the latest version as Selenium as backward incompatibility issues with Chromedriver.

• Latest Selenium version is 3.141.59
• Latest Chromedriver version is: 73.0.3683.20

ChromeDriver download link: Download Chrome Driver

Selenium download link: Download Selenium

Note:

Make sure you wait for some time after you navigate to the intended URL. Reason being, elements get populated in HTML DOM after a certain time lapse. In case, the webdriver traverses the DOM during this time, the driver.findElement() will fail to fetch the web element.

webdriver.get(url);
WebDriverWait wait_time = new WebDriverWait(webdriver, 10);

Answer 3

This error message...

Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: cannot focus element
  (Session info: chrome=61.0.3163.100)
  (Driver info: chromedriver=2.34.522940 (1a76f96f66e3ca7b8e57d503b4dd3bccfba87af1),platform=Windows NT 6.1.7601 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 0 milliseconds
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: 'DWA7DEVOS00170', ip: '10.96.162.167', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_25'
Driver info: org.openqa.selenium.chrome.ChromeDriver

...implies that the ChromeDriver was unable to focus on the desired element .

---

Your main issue is the incompatibility between the version of the binaries you are using as follows:

• You are using chromedriver=2.34
• You are using chrome=61.0
• But your JDK version is 1.8.0_25 which is pretty old and ancient .

So there is a clear mismatch between the JDK v8u25 , ChromeDriver v2.34 and the Chrome Browser v61.0

---

Solution

• Upgrade JDK to recent levels JDK 8u201 .

---

Additional Considerations

As per best practices,

• Upgrade ChromeDriver to current ChromeDriver v2.46 level.
• Upgrade Chrome version to current Chrome v71-73 levels. ( as per ChromeDriver v2.46 release notes )
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• If your base Web Client version is too old, then uninstall it and install a recent GA and released version of Web Client .
• Take a System Reboot .
• Execute your @Test .
• Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.