微服务间DTO交互报JSON解析错误（error字段未识别），求修复方案

问题详情 #

出现JSON解析错误：

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unrecognized field "error" not marked as ignorable

两个微服务间使用ProfileResource作为请求和响应DTO，请求发送代码如下：

HttpEntity<ProfileResource> requestEntity = new HttpEntity<>(request);
ResponseEntity<ProfileResource> response = null;
try {
  response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, ProfileResource.class,
          Collections.emptyMap());
} catch (Exception ex) {.....}

DTO定义：

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import java.util.List;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.NON_PRIVATE)
@JsonIgnoreProperties(ignoreUnknown = false)
public class ProfileResource {

  private String firstName;
  private Error error;
  .......
}

// Error类定义
@JsonIgnoreProperties(ignoreUnknown = true)
@Data
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public class Error implements ErrorCode {

  private String code;
}

接收方微服务返回错误：

org.springframework.web.client.HttpClientErrorException$BadRequest: 400 : "{\"error\":{\"code\":\"5023\",\"message\":\"You submitted a request that is not parseable.: field 'error' not recognized\",

问题：如何解决该问题？是否需要忽略error字段？

解决方案 #

给ProfileResource中的error字段添加@JsonInclude(JsonInclude.Include.NON_NULL)注解，确保当error为null时不会被序列化为JSON字段发送给接收方：

@JsonInclude(JsonInclude.Include.NON_NULL) 
private Error error;

内容的提问来源于stack exchange，提问作者Peter Penzov