Selenium在Jenkins Linux环境中页面刷新失效问题求助

Let's break down the core issues in your setup and fix them step by step:

1. Fix the Broken Linux Branch Logic in refreshIfNeeded() #

Your Linux-specific code has two critical flaws that make it look like refresh isn't working:

• You're refreshing the page without first checking if .ng-scope elements are missing (unlike the Windows branch)
• You're logging the pre-refresh element count instead of re-fetching it after refresh, which gives false negative results

Here's the corrected Linux branch:

public void refreshIfNeeded() {
    if(System.getProperty("os.name").equals("Linux")){
        System.out.println("### A"+now());
        int elementCount = driver.findElements(By.cssSelector(".ng-scope")).size();
        
        // Only refresh if we actually need to (no elements found)
        if (elementCount == 0) {
            System.out.println("[INFO] No .ng-scope elements found, refreshing...");
            // Use Selenium's native refresh method for better reliability
            driver.navigate().refresh();
            waitForNoSpinner();
            zatvoriModal(); // Re-close modal after refresh
            
            // Re-fetch element count post-refresh to verify
            elementCount = driver.findElements(By.cssSelector(".ng-scope")).size();
            System.out.println("[DEBUG] Post-refresh .ng-scope elements: "+elementCount);
        } else {
            System.out.println("[INFO] .ng-scope elements already present, no refresh needed.");
        }
        System.out.println("### B"+now());
    }else{
        // Keep your existing Windows logic here
        System.out.println("[] Starting refreshIfNeeded()");
        Date ts1 = new Date();
        int count = 0;
        while (driver.findElements(By.cssSelector(".ng-scope")).size()==0 && count < 10){
            driver.navigate().refresh();
            zatvoriModal();
            try {
                (new WebDriverWait(driver, 10)).until(ExpectedConditions.numberOfElementsToBeMoreThan(By.cssSelector(".ng-scope"), 0));
                Date ts2 = new Date();
                long trajanje = ts2.getTime() - ts1.getTime();
                System.out.println(String.format("[INFO] Učitavanje sadržaja: %s ms.", trajanje));
            } catch (Exception e){
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException ex) {
                    ex.printStackTrace();
                }
            }
            System.out.println("[] Count: "+count);
            count++;
        }
    }
}

2. Optimize Headless Chrome Configuration for Linux #

Your current Chrome options are missing critical flags that prevent page loading issues in Jenkins/Linux environments. Update your configuration:

if(System.getProperty("os.name").equals("Linux")){
    options.addArguments("--headless"); // Keep this for Chrome 77; use "--headless=new" for newer versions
    options.addArguments("--no-sandbox"); // Required for Jenkins (avoids permission sandbox errors)
    options.addArguments("--disable-dev-shm-usage"); // Fixes shared memory limits on Linux containers/VMS
    options.addArguments("--proxy-server='direct://'");
    options.addArguments("--proxy-bypass-list=*");
    options.addArguments("--window-size=1200,800");
    options.addArguments("--enable-javascript"); // Ensure JS is enabled (critical for Angular apps)
    options.addArguments("--disable-gpu"); // Disables unnecessary GPU acceleration in headless mode
    WebDriverManager.chromedriver().version("77.0.3865.40").setup();
}

3. Wait for Angular to Stabilize (Not Just the Loading Spinner) #

Since your app uses Angular (evidenced by .ng-scope), waiting only for the loading spinner isn't enough. Add a helper method to wait for Angular to finish rendering:

private void waitForAngular() {
    try {
        WebDriverWait wait = new WebDriverWait(driver, 30);
        wait.until(driver -> {
            JavascriptExecutor js = (JavascriptExecutor) driver;
            return (Boolean) js.executeScript(
                "return window.angular !== undefined && " +
                "angular.element(document).injector().get('$http').pendingRequests.length === 0"
            );
        });
    } catch (Exception e) {
        // Fallback if Angular check fails
        System.out.println("[WARN] Angular check failed, falling back to element wait.");
        (new WebDriverWait(driver, 30)).until(ExpectedConditions.numberOfElementsToBeMoreThan(By.cssSelector(".ng-scope"), 0));
    }
}

Call this method after page load and refresh to ensure Angular has fully rendered elements.

4. Why Robot Class Isn't Working (And Why You Should Avoid It) #

The Robot class relies on a graphical X11 environment, which doesn't exist in headless Jenkins setups. Even if you disable headless, Jenkins typically runs without a display. Stick to Selenium's native navigation methods—they're designed for browser automation and don't depend on GUI environments.

内容的提问来源于stack exchange，提问作者Mate Mrše