java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap error using GeckoDriver Firefox through Selenium in Java

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This error message…

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
    at org.openqa.selenium.firefox.FirefoxDriver

…implies that the file com/google/common/collect/ImmutableMap might be corrupted or there is some incompatibility between the version of the binaries you are using specifically with the guava version / dependency (maven).

You need to take care of a couple of things as follows:

  • In the System.setProperty() line you need to change webdriver.firefox.marionette to webdriver.gecko.driver. So effectively, the line of code will be:

    System.setProperty("webdriver.gecko.driver","C:\\Program Files\\Java\\jre1.8.0_231\\lib\\ext\\geckodriver.exe");

  • Incase you are using maven deleting the corrup/incompatible .m2 folder can solve your issue.

  • Upgrade JDK to recent levels JDK 8u222.

  • Upgrade Selenium to current levels Version 3.141.59.

  • Upgrade GeckoDriver to GeckoDriver v0.26.0 level.

  • GeckoDriver is present in the desired location.

  • GeckoDriver is having executable permission for non-root users.

  • Upgrade Firefox version to Firefox v70.0 levels.

  • Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.

  • (WindowsOS only) Use CCleaner tool to wipe off all the OS chores before and after the execution of your Test Suite.

  • (LinuxOS only) Free Up and Release the Unused/Cached Memory in Ubuntu/Linux Mint before and after the execution of your Test Suite.

  • If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.

  • Take a System Reboot.

  • Execute your Test as a non-root user.

  • Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.

Reference

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