Jackson Deserialization Issues with Native Image build

[subash89]

Hi all,
I am trying to read a yaml file into an Object using Jackson at server startup. And with native image, I am getting following error.
Any way to get around this ? I have added @introspected to the relevant classes.

Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of com.test.AppConfiguration: cannot deserialize from Object value (no delegate- or property-based Creator): this appears to be a native image, in which case you may need to configure reflection for the class that is to be deserialized at [Source: (ByteArrayInputStream); line: 1, column: 1] at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1909) at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:408) at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1349) at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1417) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:352) at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:185) at com.fasterxml.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:323) at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4730) at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3714)

[subash89]

Is this any known issue ? Appreciate any input.

[yawkat]

can you show the full bean class?

[graemerocher]

how are you obtaining the ObjectMapper?

[subash89]

I am using Jackson Object mapper directly to read a legacy yaml file. That's why micronaut object mapper is not used only for this particular case. Following is how I create it.

<dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>${jackson.version}</version>
</dependency>

ObjectMapper mapper = new ObjectMapper(new YAMLFactory());

Here's the class.

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.test.TokenConfig;
import io.micronaut.core.annotation.Introspected;
import io.micronaut.core.annotation.ReflectiveAccess;
import lombok.Setter;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
import java.util.Set;

@ReflectiveAccess
@JsonIgnoreProperties(ignoreUnknown = true)
@Getter
@Setter
public class AppConfiguration {

    @NotEmpty
    private String IMGroup ;

    @NotEmpty
    private String adminUser;

    @NotEmpty
    private String adminPassword;

    @Valid
    private TokenConfig tokenConfig;

    @JsonProperty
    private Set<String> masked;

}

[graemerocher]

if you instantiate the ObjectMapper directly then Jackson will use reflection and you will have to register the reflective metadata for the class. It seems you already have @ReflectAccess, most likely you are missing the micronaut-graal processor

[subash89]

@graemerocher after adding the processor that particular error went away. But still object mapper cannot read the value. Fails with following error.

Caused by: java.lang.InternalError: com.oracle.svm.core.jdk.UnsupportedFeatureError: Defining hidden classes at runtime is not supported.
at [email protected]/java.lang.invoke.InnerClassLambdaMetafactory.generateInnerClass(InnerClassLambdaMetafactory.java:413)
at [email protected]/java.lang.invoke.InnerClassLambdaMetafactory.spinInnerClass(InnerClassLambdaMetafactory.java:315)
at [email protected]/java.lang.invoke.InnerClassLambdaMetafactory.buildCallSite(InnerClassLambdaMetafactory.java:228)
at [email protected]/java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:341)
at com.fasterxml.jackson.module.blackbird.deser.BBDeserializerModifier.createSetter(BBDeserializerModifier.java:208)
at com.fasterxml.jackson.module.blackbird.deser.BBDeserializerModifier.nextProperty(BBDeserializerModifier.java:191)
at com.fasterxml.jackson.module.blackbird.deser.BBDeserializerModifier.findOptimizableProperties(BBDeserializerModifier.java:130)
at com.fasterxml.jackson.module.blackbird.deser.BBDeserializerModifier.updateBuilder(BBDeserializerModifier.java:83)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:287)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:151)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:415)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:350)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:648)
at com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(ObjectMapper.java:4861)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4731)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3714)

[yawkat]

you cant use blackbird with graal

[subash89]

Is there any alternative I can use? is micronaut Jackson help ?

[yawkat]

you dont need blackbird

[subash89]

After removing blackbird it worked.