Cucumber - Java - Exception in thread "main" java.lang.NoClassDefFoundError: io/cucumber/plugin/ConcurrentEventListener

Question

我已经尝试搜索特定错误。尽管 java.lang.NoClassDefFoundError 的问题回答很少，但我找不到 io/cucumber/plugin/ConcurrentEventListener.

的问题

我正在创建一个基本的黄瓜测试以登录 public 网站
我已经实现了一个单独的 webconnector 模块来处理使用 pico-container 的驱动程序操作
我知道添加到 pom.xml 的依赖项有问题，但无法将根本原因归零。

当我运行功能文件中的场景（甚至使用运行ner）时，我在运行测试时一直出现以下错误。

对于我所面临的问题的任何帮助或指示，我将不胜感激。谢谢。

堆栈跟踪：

*

***Exception in thread "main" java.lang.NoClassDefFoundError: io/cucumber/plugin/ConcurrentEventListener**
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:468)
    at java.net.URLClassLoader.access0(URLClassLoader.java:74)
    at java.net.URLClassLoader.run(URLClassLoader.java:369)
    at java.net.URLClassLoader.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    at cucumber.runtime.formatter.PluginFactory.loadClass(PluginFactory.java:174)
    at cucumber.runtime.formatter.PluginFactory.pluginClass(PluginFactory.java:166)
    at cucumber.runtime.formatter.PluginFactory.getPluginClass(PluginFactory.java:223)
    at cucumber.runtime.formatter.PluginFactory.isStepDefinitionReporterName(PluginFactory.java:206)
    at io.cucumber.core.options.RuntimeOptionsBuilder$ParsedPluginData.addPluginName(RuntimeOptionsBuilder.java:213)
    at io.cucumber.core.options.RuntimeOptionsBuilder.addPluginName(RuntimeOptionsBuilder.java:61)
    at io.cucumber.core.options.RuntimeOptionsParser.parse(RuntimeOptionsParser.java:90)
    at io.cucumber.core.options.CommandlineOptionsParser.parse(CommandlineOptionsParser.java:25)
    at io.cucumber.core.options.CommandlineOptionsParser.parse(CommandlineOptionsParser.java:29)
    at io.cucumber.core.cli.Main.run(Main.java:29)
    at io.cucumber.core.cli.Main.main(Main.java:14)
Caused by: java.lang.ClassNotFoundException: io.cucumber.plugin.ConcurrentEventListener
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 23 more
Process finished with exit code 1*

*

我的pom.xml:

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>7</source>
                    <target>7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
<!--        Selenium Dependencies-->
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-api</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-server</artifactId>
            <version>3.14.0</version>
        </dependency>
<!--        Selenium Drivers -->
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-firefox-driver</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-chrome-driver</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-remote-driver</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-ie-driver</artifactId>
            <version>3.14.0</version>
        </dependency>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-edge-driver</artifactId>
            <version>3.14.0</version>
        </dependency>
<!--        Cucumber Dependencies-->
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-java</artifactId>
            <version>4.8.1</version>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-java8</artifactId>
            <version>4.8.1</version>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-core</artifactId>
            <version>4.8.1</version>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-junit</artifactId>
            <version>4.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>gherkin</artifactId>
            <version>5.0.0</version>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-picocontainer</artifactId>
            <version>5.0.0</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>net.masterthought</groupId>
            <artifactId>cucumber-reporting</artifactId>
            <version>4.8.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.0.0-M2</version>
        </dependency>
        <dependency>
            <groupId>org.assertj</groupId>
            <artifactId>assertj-core</artifactId>
            <version>3.13.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>io.cucumber</groupId>
            <artifactId>cucumber-junit</artifactId>
            <version>4.8.1</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

测试运行ner:

package Runners;

import io.cucumber.junit.Cucumber;
import io.cucumber.junit.CucumberOptions;
import org.junit.runner.RunWith;

@RunWith(Cucumber.class)
@CucumberOptions(
        dryRun = false,
        strict = true,
        monochrome = true,
        features = {"src/test/resources/features"},
        glue = {"StepDefs","WebConnector"},
        plugin = {
                "pretty"
        }
)
public class Runner {
}

以及样本特征文件：

Feature: User logs into the account on National Rail
  Background: Browser set up
  Given The browser is launched Chrome
  Scenario Outline: User successfully logs in to the account
    Given I am on Home page
    And I enter login credentials <User_Id>,<Password>
    Examples:
    | User_Id |Password  |
    | UserId1 |password1 |
    | UserId2 |password2 |

Answer 1

尝试将所有 Cucumber 依赖项升级到 v5，您似乎有 gherkin 的 v5，但其余的是 v4。

如果您检查 github，v4 but there's one for v5

没有 ConcurrentEventListener

我相信，这应该可以解决您的问题。

Answer 2

请确保对所有 Cucumber 依赖项使用相同的版本。

您目前正在混合 <version>4.8.1</version> 和 <version>5.0.0</version>。

请确保仅指定您实际需要的 (Cucumber) 依赖项。一些依赖项（例如 Gherkin）是可传递的，这意味着它们由您指定的 Cucumber 依赖项提供。

您可以在 Cucumber docs

中找到有关使用哪些依赖项（及其最新版本）的更多信息

Cucumber - Java - Exception in thread "main" java.lang.NoClassDefFoundError: io/cucumber/plugin/ConcurrentEventListener

Cucumber - Java - Exception in thread "main" java.lang.NoClassDefFoundError: io/cucumber/plugin/ConcurrentEventListener

noclassdeffounderror

event-listener

cucumber-java