jackson-databind

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Describe the bug

Jackson 2.13.5 Spring Boot 2.17.x Mybatis 3.5.x JDK 17

Here is my Mybatis map.xml

<resultMap id="BaseResultMap" type="User">
	<id property="id" column="id" jdbcType="INTEGER"/>
	<result property="name" column="name" jdbcType="VARCHAR"/>
	<collection property="bookNames"
				ofType="String"
				column="name"
				jdbcType="VARCHAR"
				select="BookMapper.listBookNamesByOwner" fetchType="lazy"/>
</resultMap>

......

<select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
	select
	<include refid="Base_Column_List" />
	from user
	where id = #{id,jdbcType=INTEGER}
</select>

jackson cannot serialize the result of selectByPrimaryKey because of fetchType="lazy", error message like this:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS)

and if set fetchType=“eager" or remove fetchType="lazy", Jackson works fine.

Version Information

Jackson verison: 2.13.5

Reproduction