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  1. ,
    via oracle.com by Unknown author

    App tries to load in a class through its string name using forName method in class Class, findSystemClass method in class ClassLoader, loadClass method in class ClassLoader but no definition for the class with the specified name could be found.

  2. ,

    Unless you are involved in dynamic class loading and using the Java Reflection API, chances are that the ClassNotFoundException error you are getting is not from your application code but from a referencing API.

Solutions on the web

via Apache's JIRA Issue Tracker by Hans Dockter, 1 year ago
via apache.org by Unknown author, 2 years ago
via Google Groups by Santiago Sánchez, 8 months ago
Type beast.core.Prior not present
via Google Groups by Hector Colmenares, 1 month ago
Type com.google.gerrit.server.account.GetGroups not present
via apache.org by Unknown author, 2 years ago
via GitHub by cmoulliard
, 1 year ago
java.lang.ClassNotFoundException: ActorMessage	at java.net.URLClassLoader$1.run(URLClassLoader.java:217)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:205)	at java.lang.ClassLoader.loadClass(ClassLoader.java:323)	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:664)	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:763)	at java.lang.ClassLoader.loadClass(ClassLoader.java:268)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:336)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:264)	at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:113)	at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)	at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)	at sun.reflect.generics.visitor.Reifier.reifyTypeArguments(Reifier.java:68)	at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:138)	at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)	at sun.reflect.generics.repository.FieldRepository.getGenericType(FieldRepository.java:85)	at java.lang.reflect.Field.getGenericType(Field.java:241)	at org.codehaus.groovy.vmplugin.v5.Java5.configureClassNode(Java5.java:273)	at org.codehaus.groovy.ast.ClassNode.lazyClassInit(ClassNode.java:259)	at org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass(ClassNode.java:925)	at org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass(ClassNode.java:920)	at org.codehaus.groovy.ast.ClassNode.getSuperClass(ClassNode.java:914)	at org.codehaus.groovy.ast.ClassNode.isDerivedFrom(ClassNode.java:857)	at org.codehaus.groovy.classgen.AsmClassGenerator.assignmentCastAndVisit(AsmClassGenerator.java:3976)	at org.codehaus.groovy.classgen.AsmClassGenerator.evaluateEqual(AsmClassGenerator.java:3929)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitDeclarationExpression(AsmClassGenerator.java:1343)	at org.codehaus.groovy.ast.expr.DeclarationExpression.visit(DeclarationExpression.java:53)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitAndAutoboxBoolean(AsmClassGenerator.java:4038)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitExpressionStatement(AsmClassGenerator.java:1331)	at org.codehaus.groovy.ast.stmt.ExpressionStatement.visit(ExpressionStatement.java:40)	at org.codehaus.groovy.ast.CodeVisitorSupport.visitBlockStatement(CodeVisitorSupport.java:35)	at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitBlockStatement(ClassCodeVisitorSupport.java:161)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitBlockStatement(AsmClassGenerator.java:694)	at org.codehaus.groovy.ast.stmt.BlockStatement.visit(BlockStatement.java:51)	at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClassCodeContainer(ClassCodeVisitorSupport.java:97)	at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitConstructorOrMethod(ClassCodeVisitorSupport.java:108)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitStdMethod(AsmClassGenerator.java:573)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitConstructorOrMethod(AsmClassGenerator.java:549)	at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitMethod(ClassCodeVisitorSupport.java:119)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitMethod(AsmClassGenerator.java:651)	at org.codehaus.groovy.ast.ClassNode.visitContents(ClassNode.java:997)	at org.codehaus.groovy.ast.ClassCodeVisitorSupport.visitClass(ClassCodeVisitorSupport.java:50)	at org.codehaus.groovy.classgen.AsmClassGenerator.visitClass(AsmClassGenerator.java:261)	at org.codehaus.groovy.control.CompilationUnit$11.call(CompilationUnit.java:728)	at org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:935)	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:468)	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:282)	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:253)	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:190)	at groovy.lang.GroovyShell$2.run(GroovyShell.java:204)	at java.security.AccessController.doPrivileged(Native Method)	at groovy.lang.GroovyShell.run(GroovyShell.java:202)	at groovy.lang.GroovyShell.run(GroovyShell.java:148)	at groovy.ui.GroovyMain.processOnce(GroovyMain.java:494)	at groovy.ui.GroovyMain.run(GroovyMain.java:309)	at groovy.ui.GroovyMain.process(GroovyMain.java:295)	at groovy.ui.GroovyMain.processArgs(GroovyMain.java:112)	at groovy.ui.GroovyMain.main(GroovyMain.java:93)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:616)	at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:108)	at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:130)