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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 Mark Baker, 1 year ago
via Jenkins JIRA by Mark Baker, 1 year ago
via Google Groups by esc...@gmail.com (JIRA), 1 year ago
via Google Groups by ow...@cloudbees.com (JIRA), 1 year ago
java.lang.ClassNotFoundException: betweenCheckpoints	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:692)	at groovy.lang.GroovyClassLoader$InnerLoader.loadClass(GroovyClassLoader.java:445)	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:802)	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:790)	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:264)	at org.jboss.marshalling.AbstractClassResolver.loadClass(AbstractClassResolver.java:131)	at org.jboss.marshalling.AbstractClassResolver.resolveClass(AbstractClassResolver.java:112)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:949)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1256)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:149)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:135)	at org.jboss.marshalling.MarshallerObjectInputStream.readObjectOverride(MarshallerObjectInputStream.java:53)	at org.jboss.marshalling.river.RiverObjectInputStream.readObjectOverride(RiverObjectInputStream.java:307)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:363)	at java.util.HashMap.readObject(HashMap.java:1155)	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:601)	at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1638)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:149)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:135)	at org.jboss.marshalling.MarshallerObjectInputStream.readObjectOverride(MarshallerObjectInputStream.java:53)	at org.jboss.marshalling.river.RiverObjectInputStream.readObjectOverride(RiverObjectInputStream.java:307)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:363)	at com.cloudbees.groovy.cps.SerializableScript.readObject(SerializableScript.java:30)	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:601)	at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1638)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:149)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:135)	at org.jboss.marshalling.MarshallerObjectInputStream.readObjectOverride(MarshallerObjectInputStream.java:53)	at org.jboss.marshalling.river.RiverObjectInputStream.readObjectOverride(RiverObjectInputStream.java:307)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:363)	at java.util.HashMap.readObject(HashMap.java:1155)	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:601)	at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1638)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1607)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:149)	at org.jboss.marshalling.river.BlockUnmarshaller.readObject(BlockUnmarshaller.java:135)	at org.jboss.marshalling.MarshallerObjectInputStream.readObjectOverride(MarshallerObjectInputStream.java:53)	at org.jboss.marshalling.river.RiverObjectInputStream.readObjectOverride(RiverObjectInputStream.java:307)	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:363)	at java.util.TreeMap.buildFromSorted(TreeMap.java:2403)	at java.util.TreeMap.buildFromSorted(TreeMap.java:2344)	at java.util.TreeMap.readObject(TreeMap.java:2290)	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:601)	at org.jboss.marshalling.reflect.SerializableClass.callReadObject(SerializableClass.java:307)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1638)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)	at org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)	at org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)	at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)	at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution$2.onSuccess(CpsFlowExecution.java:447)	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution$2.onSuccess(CpsFlowExecution.java:441)	at org.jenkinsci.plugins.workflow.support.concurrent.Futures$1.run(Futures.java:150)	at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:253)	at com.google.common.util.concurrent.ExecutionList$RunnableExecutorPair.execute(ExecutionList.java:149)	at com.google.common.util.concurrent.ExecutionList.add(ExecutionList.java:105)	at com.google.common.util.concurrent.AbstractFuture.addListener(AbstractFuture.java:155)	at org.jenkinsci.plugins.workflow.support.concurrent.Futures.addCallback(Futures.java:160)	at org.jenkinsci.plugins.workflow.support.concurrent.Futures.addCallback(Futures.java:90)	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution.loadProgramAsync(CpsFlowExecution.java:438)	at com.cloudbees.workflow.cps.checkpoint.ResumedCpsFlowExecution.start(ResumedCpsFlowExecution.java:44)	at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:189)	at hudson.model.ResourceController.execute(ResourceController.java:98)	at hudson.model.Executor.run(Executor.java:381)