[오류노트] elasticsearch LocalDateTime 파싱 에러

"reason":"failed to parse date field

"type":"date_time_parse_exception"

problem

spring boot 에서 

spring data Elasticsearch 를 사용중에 엔티티를 ES 로 보내는 과정에서 Date 타입이 바뀌었다.

{"error":{"root_cause":[{"type":"document_parsing_exception","reason":"[1:212] failed to parse field [createdAt] of type [date] in document with id 'Hs_n85gB5cX2woQzknEm'. Preview of field's value: '2025-08-29'"}],"type":"document_parsing_exception","reason":"[1:212] failed to parse field [createdAt] of type [date] in document with id 'Hs_n85gB5cX2woQzknEm'. Preview of field's value: '2025-08-29'","caused_by":{"type":"illegal_argument_exception","reason":"failed to parse date field [2025-08-29] with format [yyyy-MM-dd'T'HH:mm:ss]","caused_by":{"type":"date_time_parse_exception","reason":"Text '2025-08-29' could not be parsed at index 10"}}},"status":400}

---

solution

data class Entity(

    .
    .
    .
    // 변경 전
    @Field(type = FieldType.Date,)
    val createdAt: LocalDateTime,

	// 변경 후
    @Field(
        type = FieldType.Date,
        format = [DateFormat.date_hour_minute_second],
        pattern = ["yyyy-MM-dd'T'HH:mm||yyyy-MM-dd'T'HH:mm:ss||strict_date_optional_time"]
    )
      val createdAt: LocalDateTime,

포맷 타입을 지정 해주었더니 잘 들어감 !