Spring Boot ClassNotFoundException org.springframework.core.metrics.ApplicationStartup

I was able to solve this by downgrading Spring Boot: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.3.3.RELEASE</version> </dependency> Guess it’s just not compatible with 2.4.0 yet. Specifically I also had to ensure that I used 2.3.3.RELEASE and not anything more recent due to other issues I ran across.

Tomcat 10.x throws java.lang.NoClassDefFoundError on javax.servlet.* [duplicate]

According to your logs, C:\Users\Ing.Girbson BIJOU\Documents\NetBeansProjects\apache-tomcat-10.0.4-windows-x64\apache-tomcat-10.0.4\conf\Catalina\localhost\VirtualStore.xml you’re thus using Tomcat 10.x which is based off Servlet API version 5.0 which in turn is part of Jakarta EE version 9. However, this exception is unexpected: java.lang.NoClassDefFoundError: javax/servlet/ServletRequestListener Basically, the deployed web application is looking for javax.servlet.*, but it should actually be looking for jakarta.servlet.*. Namely, the … Read more

ClassNotFoundException vs NoClassDefFoundError

NoClassDefFoundError Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found. The searched-for class definition existed when the … Read more

JavaFX Exception in thread “main” java.lang.NoClassDefFoundError: javafx/application/Application

I’ve worked on this very same issue for the past few hours. Even though I haven’t seen it written explicitly, it appears that you MUST use one of the JavaFX packaging tools, which is either an Ant task or the javafxpackager executable. (See http://docs.oracle.com/javafx/2/deployment/packaging.htm, section 5.3.1). The NetBeans IDE uses Ant to package the code. … Read more

Why NoClassDefFoundError caused by static field initialization failure?

The answer to such questions is usually buried somewhere in the specs… (§12.4.2) What happens when classes are initialized: Steps 1-4 are somewhat unrelated to this question. Step 5 here is what triggers the exception: 5. If the Class object is in an erroneous state, then initialization is not possible. Release the lock on the … Read more

java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory

I found the solution here: http://forums.opensuse.org/applications/391114-tomcat6-eclipse-not-working.html In Eclipse, Open the “Server” tab. Double click on the “Tomcat6” entry to see the configuration. Then click on the “Open launch configuration” link in the “General information” block. In the dialog, select the “Classpath” tab. Click the “Add external jar” button. Select the file “/usr/share/tomcat6/bin/tomcat-juli.jar” Close the dialog. … Read more

Gson NoClassDefFoundError after ADT and SDK Tools update to v17

I faced a similar problem today. This fixed it for me: Remove all Android Library projects and external jars from the build path. Create a folder named ‘libs’ in your project. Place all external .jars in that folder, the ADT should now place them under ‘Android Dependencies’. Re-import all your previous Android Library projects the … Read more

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