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  1. ,
    via 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 Stack Overflow by chakez forevah
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via GitHub by dorpsidioot
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java.lang.ClassNotFoundException: be.powerdale.hazelcast.BasicEvent
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java.lang.ClassNotFoundException: io.github.bucket4j.grid.hazelcast.HazelcastEntryProcessorAdapter
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via GitHub by philnate
, 5 days ago
java.lang.ClassNotFoundException: org.springframework.session.hazelcast.HazelcastSessionRepository$SessionUpdateEntryProcessor
com.hazelcast.nio.serialization.HazelcastSerializationException: java.lang.ClassNotFoundException: at com.hazelcast.internal.serialization.impl.JavaDefaultSerializers$ at at com.hazelcast.internal.serialization.impl.AbstractSerializationService.toObject( at at com.hazelcast.session.HazelcastSessionIdManager.cleanUp( at com.hazelcast.session.HazelcastSessionIdManager$ at java.util.TimerThread.mainLoop( at by: java.lang.ClassNotFoundException: at$ at$ at Method) at at java.lang.ClassLoader.loadClass( at java.lang.ClassLoader.loadClass( at com.hazelcast.nio.ClassLoaderUtil.tryLoadClass( at com.hazelcast.nio.ClassLoaderUtil.loadClass( at com.hazelcast.nio.IOUtil$ClassLoaderAwareObjectInputStream.resolveClass( at at at at at at java.util.HashMap.readObject( at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke( at sun.reflect.DelegatingMethodAccessorImpl.invoke( at java.lang.reflect.Method.invoke( at at at at at at at at at at com.hazelcast.internal.serialization.impl.JavaDefaultSerializers$ ... 7 more