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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 Jenkins JIRA by Andreas Kleber, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/var/cache/jenkins/war/WEB-INF/lib/jenkins-core-1.509.3.jar!/lib/form/block.jelly:32:22: <d:invokeBody> hudson/maven/AbstractMavenProject
via Jenkins JIRA by Andreas Kleber, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/var/cache/jenkins/war/WEB-INF/lib/jenkins-core-1.509.3.jar!/lib/form/block.jelly:32:22: <d:invokeBody> hudson/maven/AbstractMavenProject
via Jenkins JIRA by dlavelle, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/var/run/jenkins/war/WEB-INF/lib/jenkins-core-1.509.1.jar!/lib/form/entry.jelly:73:23: <d:invokeBody> Failed to write to client
via Jenkins JIRA by dlavelle, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/var/run/jenkins/war/WEB-INF/lib/jenkins-core-1.509.1.jar!/lib/form/entry.jelly:73:23: <d:invokeBody> Failed to write to client
via Jenkins JIRA by David Resnick, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/tmp/jetty-0.0.0.0-8080-jenkins.war--any-/webapp/WEB-INF/lib/jenkins-core-1.537.jar!/lib/form/optionalProperty.jelly:44:72: <st:include> No page found 'config.jelly' for class com.synopsys.arc.jenkinsci.plugins.jobrestrictions.jobs.UserIdCauseRestriction$DescriptorImpl
via Jenkins JIRA by David Resnick, 1 year ago
org.apache.commons.jelly.JellyTagException: jar:file:/tmp/jetty-0.0.0.0-8080-jenkins.war--any-/webapp/WEB-INF/lib/jenkins-core-1.537.jar!/lib/form/optionalProperty.jelly:44:72: <st:include> No page found 'config.jelly' for class com.synopsys.arc.jenkinsci.plugins.jobrestrictions.jobs.UserIdCauseRestriction$DescriptorImpl
java.lang.ClassNotFoundException: hudson.maven.AbstractMavenProject	at java.net.URLClassLoader$1.run(URLClassLoader.java:217)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:205)	at java.lang.ClassLoader.loadClass(ClassLoader.java:321)	at java.lang.ClassLoader.loadClass(ClassLoader.java:266)	at hudson.plugins.sloccount.SloccountDescriptor.isApplicable(SloccountDescriptor.java:24)	at hudson.tasks.BuildStepDescriptor.filter(BuildStepDescriptor.java:84)	at hudson.Functions.getPublisherDescriptors(Functions.java:728)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:616)	at org.apache.commons.jexl.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:258)	at org.apache.commons.jexl.parser.ASTMethod.execute(ASTMethod.java:104)	at org.apache.commons.jexl.parser.ASTReference.execute(ASTReference.java:83)	at org.apache.commons.jexl.parser.ASTReference.value(ASTReference.java:57)	at org.apache.commons.jexl.parser.ASTReferenceExpression.value(ASTReferenceExpression.java:51)	at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:80)	at hudson.ExpressionFactory2$JexlExpression.evaluate(ExpressionFactory2.java:74)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:58)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)	at org.apache.commons.jelly.tags.core.WhenTag.doTag(WhenTag.java:46)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:161)	at org.apache.commons.jelly.tags.core.ChooseTag.doTag(ChooseTag.java:38)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)	at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:146)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$1.run(CoreTagLibrary.java:98)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.CallTagLibScript$1.run(CallTagLibScript.java:98)	at org.apache.commons.jelly.tags.define.InvokeBodyTag.doTag(InvokeBodyTag.java:91)	at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.kohsuke.stapler.jelly.ReallyStaticTagLibrary$1.run(ReallyStaticTagLibrary.java:99)	at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.CallTagLibScript.run(CallTagLibScript.java:119)	at org.apache.commons.jelly.tags.core.CoreTagLibrary$2.run(CoreTagLibrary.java:105)	at org.kohsuke.stapler.jelly.JellyViewScript.run(JellyViewScript.java:81)	at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:63)	at org.kohsuke.stapler.jelly.DefaultScriptInvoker.invokeScript(DefaultScriptInvoker.java:53)	at org.kohsuke.stapler.jelly.JellyFacet$1.dispatch(JellyFacet.java:95)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)	at org.kohsuke.stapler.MetaClass$6.doDispatch(MetaClass.java:241)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:677)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:770)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:583)	at org.kohsuke.stapler.Stapler.service(Stapler.java:214)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:45)	at winstone.ServletConfiguration.execute(ServletConfiguration.java:248)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:333)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:376)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:95)	at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:58)	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:98)	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:48)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)	at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.ui.basicauth.BasicProcessingFilter.doFilter(BasicProcessingFilter.java:174)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at jenkins.security.ApiTokenFilter.doFilter(ApiTokenFilter.java:64)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)	at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:66)	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:164)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)	at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)	at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)	at winstone.RequestDispatcher.forward(RequestDispatcher.java:331)	at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:227)	at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)	at java.util.concurrent.FutureTask.run(FutureTask.java:166)	at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)	at java.lang.Thread.run(Thread.java:679)