java.lang.NoClassDefFoundError: org/openqa/selenium/remote/SessionNotFoundException

java.lang.NoClassDefFoundError: org/openqa/selenium/remote/SessionNotFoundException

提问by rich

I am using Firefox 45.0 and Dependency added in pom.xmlis selenium-firefox-driver 2.53.0.

我正在使用 Firefox 45.0 并且添加了依赖项pom.xml是 selenium-firefox-driver 2.53.0.

java.lang.NoClassDefFoundError: org/openqa/selenium/remote/SessionNotFoundException
    at TestFIles_MDM.Test_Authn.setup(Test_Authn.java:27)

Error is coming for both Firefox and Chrome.

Firefox 和 Chrome 都会出错。

How can I resolve it, it was working last week.

我该如何解决它，它上周工作。

回答by Kiril S.

I think you are missing this dependency in pom.xml:

我认为您在 pom.xml 中缺少此依赖项：

<dependency>
    <groupId>org.seleniumhq.selenium</groupId>
    <artifactId>selenium-java</artifactId>
    <version>2.53.0</version>
</dependency>  

Check Selenium docs about Maven dependencies.

检查有关 Maven 依赖项的 Selenium 文档。

回答by Shivam

Voila, It's worked for me.Just updated the selenium-java dependency in pom.xml

瞧，它对我有用。刚刚更新了 pom.xml 中的 selenium-java 依赖项

<!--  Selenium java-jar dependency -->

<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-java</artifactId>
<version>2.53.1</version>
</dependency>

Or here is the link to get the updated version- https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java

或者这里是获取更新版本的链接 - https://mvnrepository.com/artifact/org.seleniumhq.selenium/selenium-java

回答by BS_CC

This happened with me while trying to update to remote driver to 3.0.1 from 2.53.1. I just reverted it back to 2.53.1 and it went away

这发生在我尝试从 2.53.1 更新到 3.0.1 的远程驱动程序时。我只是将它恢复到 2.53.1 并且它消失了

<dependency>
<groupId>org.seleniumhq.selenium</groupId>
<artifactId>selenium-remote-driver</artifactId>
<version>2.53.1</version>
</dependency>

回答by Chris

Run mvn dependency:treein your project, and check what is transitively depending on selenium-remote-driver.

mvn dependency:tree在您的项目中运行，并检查依赖于selenium-remote-driver.

In my project, I was correctly depending on selenium-javaat 2.53.1, but another test dependency was depending on an older version (2.40.0); that meant my tests were using the 2.40.0version of selenium-remote-driverat runtime, which causes the java.lang.NoClassDefFoundError: org/openqa/selenium/remote/SessionNotFoundExceptionerror.

在我的项目中，我正确地依赖于selenium-javaat 2.53.1，但另一个测试依赖依赖于旧版本（2.40.0）；这意味着我的测试使用的2.40.0是selenium-remote-driver运行时的版本，这会导致java.lang.NoClassDefFoundError: org/openqa/selenium/remote/SessionNotFoundException错误。

If you have transitive dependencies on selenium-remote-driver, you have two options for "fixing" them:

如果您对 有传递依赖关系selenium-remote-driver，则有两个选项可以“修复”它们：

1. Update the artifact that's depending on the older version to either
   • Not depend on the artifact at all, or
   • Use the latest version.

2. Add an entry in your pom.xml's <dependencyManagement>section for selenium-javato peg the artifact at version 2.53.1.

   This will affect the version of selenium-javaboth in your project and all your nested maven dependencies, too; be aware that those nested artifacts may not work well with the latest version!

1. 将依赖于旧版本的工件更新为
   • 完全不依赖于工件，或者
   • 使用最新版本。

2. 在您pom.xml的<dependencyManagement>部分中添加一个条目，selenium-java以便将工件固定在 version 上2.53.1。

   这也会影响selenium-java项目和所有嵌套 Maven 依赖项中的版本；请注意，这些嵌套工件可能不适用于最新版本！

It's also worth mentioning that selenium-javaversion 2.53.0had a Firefox incompatibility problem; version 2.53.1allegedly fixes that. See http://seleniumsimplified.com/2016/06/use_selenium_webdriver_jar_locally/for more details.

还值得一提的是，该selenium-java版本2.53.0存在 Firefox 不兼容问题；2.53.1据称版本修复了这个问题。有关更多详细信息，请参阅http://seleniumsimplified.com/2016/06/use_selenium_webdriver_jar_locally/。

Hope this helps :)

希望这可以帮助 ：）

回答by Hyman west

I ran into this too. I changed to the following and it went away.

我也遇到了这个。我更改为以下内容，它消失了。

<dependency>
  <groupId>org.seleniumhq.selenium</groupId>
  <artifactId>selenium-server</artifactId>
  <version>4.0.0-alpha-2</version>
</dependency>


    <dependency>
        <groupId>io.appium</groupId>
        <artifactId>java-client</artifactId>
        <version>6.1.0</version>
        <scope>provided</scope>
    </dependency>