Tips for addressing the Stale Element Reference Exception when locating an element in JMeter

Trying to locate an element with a structure similar to the following:

<div>
 <div>
  <div>
    <ul>
     <object id = "obj"
       #document (link here)
        <html>
         <head> </head>
          <body>
            <div id = style4 >

I have attempted various methods to find this element, but it consistently results in a stale element exception. Here's what I've tried:

 var table = wait.until(pkg.ExpectedConditions.presenceOfElementLocated(pkg.By.xpath('/html/body/div[8]/div/div/div[2]/div/div[2]/div/div/ul')));
    WDS.browser.executeScript("arguments[0].scrollIntoView(true);", table);
    WDS.log.info("Got Table");

    // Find the <object> element within the table
    var objectElement = table.findElement(pkg.By.tagName('object'));
    WDS.log.info("Found objectElement");

    // Extract the content of the <object> element
    var objectContent = objectElement.getAttribute('data');
    WDS.log.info("Extracted objectContent");

    // Refresh the <object> element to prevent staleness
    WDS.browser.executeScript("arguments[0].scrollIntoView(true);", objectElement);
    WDS.log.info("Refreshed objectElement");

    // Load the content document of the <object> element
    var contentDocument = WDS.browser.executeScript("return arguments[0].contentDocument", objectElement);
    WDS.log.info("Loaded contentDocument");

    // Find the <html> element within the content document
    var htmlElement = contentDocument.querySelector('html');
    WDS.log.info("Found htmlElement: " + htmlElement);

This is the accompanying log:

2024-02-21 22:42:12,278 INFO c.g.j.p.w.s.WebDriverSampler: Got Table
2024-02-21 22:42:12,289 INFO c.g.j.p.w.s.WebDriverSampler: Found objectElement
2024-02-21 22:42:12,304 INFO c.g.j.p.w.s.WebDriverSampler: Extracted objectContent
2024-02-21 22:42:12,309 INFO c.g.j.p.w.s.WebDriverSampler: Refreshed objectElement
2024-02-21 22:42:12,317 ERROR c.g.j.p.w.s.WebDriverSampler: Error: org.openqa.selenium.StaleElementReferenceException: stale element reference: stale element not found
  (Session info: chrome=122.0.6261.58)
javascriptselenium-webdriverautomationjmeterstaleelementreferenceexception

Answer №1

You may have inadvertently created the issue yourself by utilizing the JavascriptExecutor. It is unlikely that a real user would go through the trouble of opening the browser developer tools, accessing the console, and entering 

var table = document.getElementById....)
.

To avoid StaleElementReference errors, use an Explicit Wait for any element operation, such as replacing this:

var element = WDS.browser.findElement(pkg.By.id('foo'))
//something else
element.click()

You can instead do:

wait.until(pkg.ExpectedConditions.presenceOfElementLocated(pkg.By.id('foo'))).click()

When it comes to using JavaScript, it might not be the most optimal choice. In general, it's recommended to utilize JSR223 Test Elements and the Groovy language for scripting due to Groovy offering superior performance. Additionally, Nashorn engine has been removed in JDK 15, meaning JavaScript will no longer be supported in future Java versions.

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