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Question

I am updating an existing application from Spring-boot 2.x to 3.3.0 and Jackson 2.17.1. Spring Boot pulls in Spring Framework 6.1.8.

There seems to be a class from jackson-databind that has disappeared or been moved. I hope that someone can point out what happened to this class, because I can find no clear details about this online.

Details: Upon startup of my Spring Boot application, the Spring Boot application fails with a BeanCreationException:

Application run failed  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.endpoint.jackson.JacksonEndpointAutoConfiguration': Lookup method resolution failed
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.checkLookupMethods(AutowiredAnnotationBeanPostProcessor.java:497)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:367)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1296)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1191)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335)

This is nothing happening inside my code, this is happening INSIDE Spring Framework when it tries to instantiate this internal bean inside Spring Boot:

org.springframework.boot.actuate.autoconfigure.endpoint.jackson.JacksonEndpointAutoConfiguration

The underlying problem seems to be that this class from the jackson-databind library cannot be found:

com.fasterxml.jackson.databind.ObjectMapper

The code in the Spring Framework class imports this class directly:

package org.springframework.boot.actuate.autoconfigure.endpoint.jackson;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import org.springframework.boot.actuate.endpoint.jackson.EndpointObjectMapper;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for Endpoint Jackson support.
 *
 * @author Phillip Webb
 * @since 3.0.0
 */
@Configuration(proxyBeanMethods = false)
@AutoConfigureAfter(JacksonAutoConfiguration.class)
public class JacksonEndpointAutoConfiguration {

    @Bean
    @ConditionalOnProperty(name = "management.endpoints.jackson.isolated-object-mapper", matchIfMissing = true)
    @ConditionalOnClass({ ObjectMapper.class, Jackson2ObjectMapperBuilder.class })
    public EndpointObjectMapper endpointObjectMapper() {
       ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json()
          .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS,
                SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS)
          .serializationInclusion(Include.NON_NULL)
          .build();
       return () -> objectMapper;
    }

}

This might create a problem for anyone trying to use Jackson and Spring together. Here’s a graph of the dependencies (from maven dependency:tree)

[INFO] +- org.springframework.boot:spring-boot-starter-web:jar:3.3.0:compile
[INFO] |  +- (org.springframework.boot:spring-boot-starter:jar:3.3.0:compile - version managed from 3.3.0; omitted for duplicate)
[INFO] |  +- org.springframework.boot:spring-boot-starter-json:jar:3.3.0:compile (version managed from 3.3.0)
[INFO] |  |  +- (org.springframework.boot:spring-boot-starter:jar:3.3.0:compile - version managed from 3.3.0; omitted for duplicate)
[INFO] |  |  +- (org.springframework:spring-web:jar:6.1.8:compile - version managed from 6.1.8; omitted for duplicate)
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jdk8:jar:2.17.1:compile (version managed from 2.17.1)
[INFO] |  |  |  - (com.fasterxml.jackson.core:jackson-core:jar:2.17.1:compile - version managed from 2.17.1; omitted for duplicate)
[INFO] |  |  +- com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar:2.17.1:compile (version managed from 2.17.1; scope not updated to compile)
[INFO] |  |  |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.17.1:compile (version managed from 2.17.1)
[INFO] |  |  |  - (com.fasterxml.jackson.core:jackson-core:jar:2.17.1:compile - version managed from 2.17.1; omitted for duplicate)
[INFO] |  |  - com.fasterxml.jackson.module:jackson-module-parameter-names:jar:2.17.1:compile (version managed from 2.17.1)
[INFO] |  |     - (com.fasterxml.jackson.core:jackson-core:jar:2.17.1:compile - version managed from 2.17.1; omitted for duplicate)

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Danh mục

jackson ObjectMapper class no longer in jackson-databind?