Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

STS 4.6.0 Eclipse - Springboot 2.2.5 - JUnit5 failing (NoClassDefFoundError)

See original GitHub issue

Hello,

Launching tests with JUnit5 fails for springboot applications (2.2.5).

Reason: Eclipse 4.15 ships with JUnit5 5.6.0 Springboot 2.2.5 uses JUnit5 5.5.2 (https://github.com/spring-projects/spring-boot/blob/2.2.x/spring-boot-project/spring-boot-dependencies/pom.xml)

Result:

java.lang.NoClassDefFoundError: org/junit/platform/engine/EngineDiscoveryListener
	at java.base/java.lang.ClassLoader.defineClass1(Native Method)
	at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016)
	at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174)
	at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:800)
	at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:698)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:621)
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	at org.junit.platform.launcher.core.LauncherDiscoveryRequestBuilder.getLauncherDiscoveryListener(LauncherDiscoveryRequestBuilder.java:241)
	at org.junit.platform.launcher.core.LauncherDiscoveryRequestBuilder.build(LauncherDiscoveryRequestBuilder.java:235)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createUnfilteredTest(JUnit5TestLoader.java:75)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.createTest(JUnit5TestLoader.java:66)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.loadTests(JUnit5TestLoader.java:53)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:526)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: java.lang.ClassNotFoundException: org.junit.platform.engine.EngineDiscoveryListener
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 18 more

Solution/Workaround:

adding/updating Junit5 version to 5.6.0 in build.gradle:

ext['junit-jupiter.version'] = '5.6.0'

I think that a warning on the download page would be nice until springboot updates their dependencies to JUnit5 5.6.0.

Issue Analytics

State:
Created 3 years ago
Reactions:5
Comments:8 (3 by maintainers)

Top GitHub Comments

7reactions

lneumeiercommented, Mar 27, 2020

Another solution is, adding testImplementation 'org.junit.platform:junit-platform-launcher' instead of ext['junit-jupiter.version'] = '5.6.0' to build.gradle.

@martinlippert Thank you for moving this issue to the right project.

2reactions

dsjtlmycommented, Sep 26, 2020

我使用使用相同的Eclipse，在一台电脑上可以执行 Junit5 ，另一台电脑上就报错，很奇怪。 Eclipse IDE for Enterprise Java Developers. Version: 2020-03 (4.15.0) Build id: 20200313-1211

junit-jupiter 插件版本是 5.6.0

Top Results From Across the Web

Eclipse No tests found using JUnit 5 caused by ...

I fixed the issue by right clicking the test and selecting 'Run Configurations' and changing the "Test runner:" selection to 'JUnit 4' as...

The java.lang.NoClassDefFoundError in JUnit - Baeldung

In this article, we'll understand why the java.lang.NoClassDefFoundError occurs in JUnit and how to fix it. This issue is mainly related to ...

Updates and Fixes in 3.8.3 - Spring

Sometimes Maven projects show up with a red error (talking about a duplicate lifecycle mapping conflict) after upgrading STS from 3.6. x to...

569860 – NoClassDefFoundError when running JUnit 5 tests ...

To demonstrate the problem, import the attached project, run "Refresh Gradle Project", and run DemoTest with "Run as ... > JUnit Test".

NoClassDefFoundError 1 « Exception « Spring Q&A

6. NoClassDefFoundError (initialization failure) - Websphere and IBM MQ stackoverflow.com. Im having a problem on a Spring based webapp that is being deployed ......