CODEWITHSUNDEEP
javaseleniumselenium-webdriver
Mahdi
Mahdi

Reputation: 2315

Selenium: NoClassDefFoundError WebDriverException

In some (seemingly random) cases, I get below error when working with Selenium and Chrome headless webdriver:

java.lang.NoClassDefFoundError: Could not initialize class org.openqa.selenium.WebDriverException

I guess some elements are not available in the browser which causes the exception but without an exception message I cannot be sure.

I have this in my pom.xml:

<dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>4.0.0-alpha-7</version>
</dependency>

I can create a dummy instance of WebDriverException in my code. So what can be the problem?

UPDATE: I have also seen other types of Selenium exception with no messages. This is another example with stack trace:

java.lang.NoClassDefFoundError: Could not initialize class org.openqa.selenium.ElementClickInterceptedException
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:196)
    at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:129)
    at org.openqa.selenium.remote.codec.w3c.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:53)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:167)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:123)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:501)
    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:238)
    at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:79)

Upvotes: 0

Views: 3090

Answers (1)

hfontanez
hfontanez

Reputation: 6188

WebDriverException class is part of the Selenium API distribution. That dependency is missing from your POM. Aside from that, unless you are doing an evaluation, stay away from alpha versions. Always use stable releases.

Upvotes: 1

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