Updating from Jackson 2.17 to 2.18 causes KotlinReflectionInternalError

[GFriedrich]

Hey,
I've recently tried to update from Jackson 2.17 to 2.18 and found some issue. The reason I've added this as a Q&A and not as a bug is that I think that Jackson is doing things right (actually more correct than before because of the rewrite for the POJO deserialization), but this now causes issues for me and I need to figure what I have to change.
So after the upgrade I get this stacktrace:

Unknown origin of public abstract operator fun invoke(p1: P1): R defined in kotlin.Function1[FunctionInvokeDescriptor@6dbb395b] (class kotlin.reflect.jvm.internal.impl.builtins.functions.FunctionInvokeDescriptor)
kotlin.reflect.jvm.internal.KotlinReflectionInternalError: Unknown origin of public abstract operator fun invoke(p1: P1): R defined in kotlin.Function1[FunctionInvokeDescriptor@6dbb395b] (class kotlin.reflect.jvm.internal.impl.builtins.functions.FunctionInvokeDescriptor)
	at kotlin.reflect.jvm.internal.RuntimeTypeMapper.mapSignature(RuntimeTypeMapper.kt:226)
	at kotlin.reflect.jvm.internal.KFunctionImpl.<init>(KFunctionImpl.kt:55)
	at kotlin.reflect.jvm.internal.CreateKCallableVisitor.visitFunctionDescriptor(util.kt:314)
	at kotlin.reflect.jvm.internal.CreateKCallableVisitor.visitFunctionDescriptor(util.kt:291)
	at kotlin.reflect.jvm.internal.impl.descriptors.impl.FunctionDescriptorImpl.accept(FunctionDescriptorImpl.java:826)
	at kotlin.reflect.jvm.internal.KDeclarationContainerImpl.getMembers(KDeclarationContainerImpl.kt:62)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.declaredNonStaticMembers_delegate$lambda$22(KClassImpl.kt:173)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.accessor$KClassImpl$Data$lambda10(KClassImpl.kt)
	at kotlin.reflect.jvm.internal.KClassImpl$Data$$Lambda$10.invoke(Unknown Source)
	at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:70)
	at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:32)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.getDeclaredNonStaticMembers(KClassImpl.kt:173)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.allNonStaticMembers_delegate$lambda$26(KClassImpl.kt:182)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.accessor$KClassImpl$Data$lambda14(KClassImpl.kt)
	at kotlin.reflect.jvm.internal.KClassImpl$Data$$Lambda$14.invoke(Unknown Source)
	at kotlin.reflect.jvm.internal.ReflectProperties$LazySoftVal.invoke(ReflectProperties.java:70)
	at kotlin.reflect.jvm.internal.ReflectProperties$Val.getValue(ReflectProperties.java:32)
	at kotlin.reflect.jvm.internal.KClassImpl$Data.getAllNonStaticMembers(KClassImpl.kt:182)
	at kotlin.reflect.full.KClasses.getMemberProperties(KClasses.kt:148)
	at com.fasterxml.jackson.module.kotlin.KotlinNamesAnnotationIntrospector.findDefaultCreator(KotlinNamesAnnotationIntrospector.kt:99)
	at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findDefaultCreator(AnnotationIntrospectorPair.java:746)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addCreators(POJOPropertiesCollector.java:669)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collectAll(POJOPropertiesCollector.java:451)
	at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getPotentialCreators(POJOPropertiesCollector.java:229)
	at com.fasterxml.jackson.databind.introspect.BasicBeanDescription.getPotentialCreators(BasicBeanDescription.java:348)
	at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._constructDefaultValueInstantiator(BasicDeserializerFactory.java:251)
	at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory.findValueInstantiator(BasicDeserializerFactory.java:219)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:262)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:151)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:471)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:415)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:317)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:284)
	at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:174)
	at com.fasterxml.jackson.databind.DeserializationContext.findNonContextualValueDeserializer(DeserializationContext.java:659)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:552)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:347)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:284)
	at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:174)
	at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:636)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.createContextual(CollectionDeserializer.java:190)
	at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.createContextual(CollectionDeserializer.java:30)
	at com.fasterxml.jackson.databind.DeserializationContext.handlePrimaryContextualization(DeserializationContext.java:851)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.resolve(BeanDeserializerBase.java:563)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:347)
	at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:284)
	at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:174)
	at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:669)
	at com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(ObjectMapper.java:5048)
	at com.fasterxml.jackson.databind.ObjectMapper._readValue(ObjectMapper.java:4893)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3105)
	at com.fasterxml.jackson.databind.ObjectMapper.treeToValue(ObjectMapper.java:3539)

The actual class that tries to get a deserializer here uses a property in the constructor which is a "Function1" (aka (xyz) -> abc in Kotlin). The fun fact is that the deserializer will never be used because the property is not part of the serialized data so the lookup of this information will never be used.
Now I'm wondering what to do here. I tracked the problematic line down to the BeanDeserializerFactory which now calls beanDesc.getPotentialCreators() and it didn't in the old version.
This in turn causes some introspection of those "member properties" as seen in the stacktrace, which causes this error.
I'm wondering: Would be the right way to go to place some @JsonIgnore annotations to the properties that are not part of actual serialized data to avoid this kind of introspection done by Jackson?
Thanks in advance for any help.

[cowtowncoder]

Could possibly add "ignored type" configuration to prevent any otherwise detected properties with specified value. This can be done via annotation @JsonIgnoreType on class (for 3rd party types, via mix-in annotations usually). But! There's another way too:

final ObjectMapper mapper = ...; // create mapper
mapper.configOverride(ProblematicType.class).setIsIgnoredType(true);```

which might work if you can target specific type.

Alternatively if you can annotate Constructor in question with @JsonIgnore, that'd also work.
Or, like you suggest, @JsonIgnore on specific property.

[GFriedrich]

Was finally able to get back to this (time runs fast 😅).
I've added an @JsonIgnore annotation to the corresponding getter to avoid any introspection of the property, which worked great.
So thanks for the details @cowtowncoder - much appreciated. 🙏

[cowtowncoder]

@GFriedrich Very glad you managed to get it working.