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My java selenium java test case with Chrome version 77 runs fine when options.setHeadless(false); but fails when I change this line options.setHeadless(true);

The java code was exported by the katalon selenium recorder chrome extension.

Output when it runs fine with options.setHeadless(false);:

Title of the page is 9 -> Scan History Title of the page is 10 -> Scan History Title of the page is 10.1 -> Scan History Title of the page is 10.2 -> Scan History Title of the page is 10.3 -> Scan History Title of the page is 10.4 -> Scan History Title of the page is 10.5 -> Scan History

When I run the same code with options.setHeadless(true); I get a below warning as well as an error message and the execution terminates before completion.

Title of the page is 10 -> Scan History [0530/125542.102:INFO:CONSOLE(0)] "Error parsing header X-XSS-Protection: 1; mod e=block, 1;mode=block: expected semicolon at character position 13. The default protections will be applied.", source: https://qualysguard.myshop.com/fo/scan/sca nList.php (0) Title of the page is 10.1 -> Scan History Title of the page is 10.2 -> Scan History Title of the page is 10.3 -> Scan History Exception in thread "main" org.openqa.selenium.NoSuchElementException: no such e lement: Unable to locate element: {"method":"css selector","selector":"#ext\-gen 117"} (Session info: headless chrome=77.0.3865.75) For documentation on this error, please visit: https://www.seleniumhq.org/except ions/no_such_element.html Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17 :03' System info: host: 'myhostserver', ip: '10.9.111.32', os.name: 'Windows Serve r 2012 R2', os.arch: 'amd64', os.version: '6.3', java.version: '1.8.0_45' Driver info: org.openqa.selenium.chrome.ChromeDriver Capabilities {acceptInsecureCerts: false, browserName: chrome, browserVersion: 7 7.0.3865.75, chrome: {chromedriverVersion: 77.0.3865.40 (f484704e052e0..., userD ataDir: C:\Users\1886\AppData\Loc...}, goog:chromeOptions: {debuggerAddress: l ocalhost:56128}, javascriptEnabled: true, networkConnectionEnabled: false, pageL oadStrategy: normal, platform: XP, platformName: XP, proxy: Proxy(), setWindowRe ct: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 30 0000, script: 30000}, unhandledPromptBehavior: dismiss and notify} Session ID: 09a309a747f7bcb42735bb8b6c39ad1f *** Element info: {Using=id, value=ext-gen117} at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou rce) at java.lang.reflect.Constructor.newInstance(Unknown Source) at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException( W3CHttpResponseCodec.java:187) at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpRe sponseCodec.java:122) at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpRe sponseCodec.java:49) at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExe cutor.java:158) at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(Driv erCommandExecutor.java:83) at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.ja va:552) at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDrive r.java:323) at org.openqa.selenium.remote.RemoteWebDriver.findElementById(RemoteWebD river.java:372) at org.openqa.selenium.By$ById.findElement(By.java:188) at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDrive r.java:315) at pack.QualysScan.testQualysScan(QualysScan.java:182) at pack.QualysScan.main(QualysScan.java:284)

Here is the part of the code concerning the issue:

System.out.println("Title of the page is 10 -> " + driver.getTitle()); driver.findElement(By.id("body-header")).click(); driver.get("https://qualysguard.myshop.com/fo/scan/scanList.php"); System.out.println("Title of the page is 10.1 -> " + driver.getTitle()); driver.findElement(By.xpath("(.//*[normalize-space(text()) and normalize-space(.)='Add to my Calendar'])[1]/following::em[2]")).click(); System.out.println("Title of the page is 10.2 -> " + driver.getTitle()); System.out.println("Title of the page is 10.3 -> " + driver.getTitle()); driver.findElement(By.id("ext-gen117")).click(); System.out.println("Title of the page is 10.4 -> " + driver.getTitle()); System.out.println("Title of the page is 10.5 -> " + driver.getTitle()); String your_title = "Launch Compliance Scan";

And here is how the driver is setup:

public static void setUp() throws Exception { System.setProperty("webdriver.chrome.driver", "H:\\Downloads\\Qualys\\vdi\\chromedriver.exe"); ChromeOptions options = new ChromeOptions(); options.setHeadless(true); DesiredCapabilities capabilities = DesiredCapabilities.chrome(); capabilities.setCapability(CapabilityType.ForSeleniumServer.ENSURING_CLEAN_SESSION, true); capabilities.setCapability("chrome.switches", Arrays.asList("--incognito")); options.merge(capabilities); driver = new ChromeDriver(options); driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS); }

I'm sharing snapshot of element ext\-gen117 as visible on the portal.

enter image description here

enter image description here

Video of the issue:

https://www.youtube.com/watch?v=abSwsPtOOG4

Can you please suggest how can I overcome the issue?

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  • When the test runs in headless mode, is it running from your computer or on another computer? Is this a public facing website or internal to your organization? Commented May 30, 2020 at 15:55
  • @GregBurghardt I connect to a VDI system, using VPN. From this VDI system, I'm connecting to internal website: Please have a look at the video demonstrating the issue: youtube.com/watch?v=abSwsPtOOG4 Commented May 31, 2020 at 13:19

1 Answer 1

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This is likely caused by a race condition between the browser and selenium, where selenium attempts to click on something before it exists in the DOM. Using an explicit wait should resolve the issue:

WebDriverWait wait = new WebDriverWait (driver, 30); WebElement element = wait.until(ExpectedConditions.elementToBeClickable(By.id("ext-gen117"); element.click();
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16 Comments

I'm getting this error ` cannot find symbol symbol: variable TimeSpan` what library do I need to import? can you please guide?Note: I'm using JAVA 1.8
I simply removed TimeSpan and went for default like this WebDriverWait wait = new WebDriverWait (driver, 30); I was able to compile and run but I'm again getting a different error for the same element as below: org.openqa.selenium.TimeoutException: Expected condition failed: waiting for element to be clickable: By.id : ext-gen117 (tried for 30 second(s) with 500 milliseconds interval). Please suggest.
@Asher: Updated my answer. Sorry about that. I don't write much Java.
Hi @Grey The solution does not work and times out. Please look for the exception shared in my previous comment. Kindly suggest.
@Asher: you probably need to take a screenshot of the failure before we can help you further.
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