Failed to load class 'com.test.RequestInputs$Creator4JacksonDeserializerfce499b0': com.fasterxml.jackson.module.afterburner.deser.OptimizedValueInstantiator

[nikhildigde]

Getting the below error while deserializing the inputs... com.fasterxml.jackson.module.afterburner.deser.OptimizedValueInstantiator class is however loading correctly (Class.forname works)... All the other required jars are in the classpath.. Any clue what is going wrong here? It works perfectly in other applications.

Caused by: java.lang.IllegalArgumentException: Failed to load class 'com.test.RequestInputs$Creator4JacksonDeserializerfce499b0': com.fasterxml.jackson.module.afterburner.deser.OptimizedValueInstantiator
at com.fasterxml.jackson.module.afterburner.util.MyClassLoader.loadAndResolve(MyClassLoader.java:96)
at com.fasterxml.jackson.module.afterburner.deser.CreatorOptimizer.createSubclass(CreatorOptimizer.java:93)
at com.fasterxml.jackson.module.afterburner.deser.CreatorOptimizer.createOptimized(CreatorOptimizer.java:64)
at com.fasterxml.jackson.module.afterburner.deser.DeserializerModifier.updateBuilder(DeserializerModifier.java:79)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:244)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:143)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:414)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:349)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
... 38 more
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.module.afterburner.deser.OptimizedValueInstantiator
at java.lang.ClassLoader.findClass(ClassLoader.java:523)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
at java.lang.ClassLoader.defineClass(ClassLoader.java:635)
at com.fasterxml.jackson.module.afterburner.util.MyClassLoader.loadAndResolve(MyClassLoader.java:90)
... 46 more
<Jun 2, 2021, 9:11:48,731 PM IDT> <|E |21:11:48 |Failed to load class 'com.test.RequestInputs$Creator4JacksonDeserializerfce499b0': com.fasterxml.jackson.module.afterburner.deser.OptimizedValueInstantiator

[nikhildigde]

all deps on version 2.12.1

[cowtowncoder]

I don't know what specifically fails, but the class in question looks like something Afterburner generates to call 0-argument constructor of com.test.RequestInputs class without using Reflection.
This class extends OptimizedValueInstantiator so that call to createUsingDefault() will construct a new instance.

So it may make sense to look into if there is anything special about RequestInputs class. And if possible, isolate a test for just that class with minimal getters/seters.