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java.lang.ClassCastException: class org.openqa.selenium.Platform$23 cannot be cast to class java.lang.String (org.openqa.selenium.Platform$23 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')

See original GitHub issue

Description

Unable to create both IOSDriver and AndroidDriver after upgrading Selenium to 4.2.0 and Appium to 8.1.0. Error message displayed below:

Where creating iOSDriver:

java.lang.ClassCastException: class org.openqa.selenium.Platform$23 cannot be cast to class java.lang.String (org.openqa.selenium.Platform$23 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')

	at io.appium.java_client.AppiumDriver.ensurePlatformName(AppiumDriver.java:136)
	at io.appium.java_client.ios.IOSDriver.<init>(IOSDriver.java:105)

When creating AndroidDriver:

java.lang.ClassCastException: class org.openqa.selenium.Platform$22 cannot be cast to class java.lang.String (org.openqa.selenium.Platform$22 is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')

	at io.appium.java_client.AppiumDriver.ensurePlatformName(AppiumDriver.java:136)
	at io.appium.java_client.android.AndroidDriver.<init>(AndroidDriver.java:116)

Notes

iOSDriver created with Xcuitestoptions
AndroidDriver created with both DesiredCapabilities and UiAutomator2Options
Both methods results in the same cannot cast error message above

Environment

Java client build version or git revision if you use some snapshot: 8.1.0
Appium server version or git revision if you use some snapshot: 2.0.0-beta.24
Desktop OS/version used to run Appium if necessary: MacOS Monterey
Node.js version (unless using Appium.app|exe) or Appium CLI or Appium.app|exe:
Mobile platform/version under test: iOS/Android
Real device or emulator/simulator: emulator/simulator

Issue Analytics

State:
Created a year ago
Comments:28 (7 by maintainers)

Top GitHub Comments

7reactions

cyberjaime45commented, Jun 4, 2022

I was getting this issue on my Linux machine but not on my local Mac machine. We use Jenkins with Linux slaves pointing to Saucelabs.

The work around was to change from: caps.setCapability(“platformName”, platform); to: caps.setCapability(“appium:platformName”, platform);

It works with no issues so far.

4reactions

mykola-mokhnachcommented, Jun 2, 2022

Thanks for the update @n00bstr I’ve created another patch to fix the issue related to platformVersion capability. It turns out Selenium lib tries to add workarounds to browser issues, which badly hits our client: https://github.com/SeleniumHQ/selenium/blob/b0057b54cff7991add4299d58de53245f9d9ecf9/java/src/org/openqa/selenium/AcceptedW3CCapabilityKeys.java#L45

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