[Fix] 동적 Few-shot 후보 캐시와 평가 누수 방지 보강 - #285
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- 후보별 document embedding 메모리 캐시 적용 - 캐시 miss 후보만 Cohere Embed API로 요청하도록 개선 - datasetVersion, caseId, 후보 내용을 캐시 키에 반영 - 후보 데이터 변경 시 선택 결과와 document embedding 자동 갱신 - TTL 만료 캐시 정리 및 동시 초기화 중 중복 호출 방지 - caseId가 달라도 JD, 문항, 답변이 동일한 후보 제외 - Unicode, 대소문자, 반복 공백을 정규화한 입력 hash 비교 적용 - 자기 참조 조건이 다른 선택 결과의 캐시 재사용 방지 - 캐시 및 평가 누수 방지 회귀 테스트 추가
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📝 WalkthroughWalkthroughFew-shot 검색은 선택 결과 캐시와 문서 임베딩 캐시를 분리합니다. 데이터셋 지문과 입력 정규화를 적용합니다. 동일한 후보 문서의 임베딩을 재사용하고, 후보 내용이 변경되면 다시 생성합니다. ChangesFew-shot 검색 캐시 개선
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to The caching changes improve embedding reuse and leakage prevention, but concurrent cache misses can serialize behind Cohere calls and one-off selection entries can accumulate indefinitely. This may reduce throughput and increase heap usage, so the cache concurrency and eviction behavior should be fixed before merge. Sequence Diagram(s)sequenceDiagram
participant DefaultFewShotSearchService
participant selectionCache
participant documentEmbeddingCache
participant Cohere
DefaultFewShotSearchService->>DefaultFewShotSearchService: 활성 케이스 로드 및 데이터셋 지문 계산
DefaultFewShotSearchService->>selectionCache: 지문 포함 선택 캐시 조회
DefaultFewShotSearchService->>documentEmbeddingCache: 후보 문서 임베딩 조회
documentEmbeddingCache->>Cohere: 누락 문서 임베딩 생성
Cohere-->>documentEmbeddingCache: 문서 임베딩 반환
documentEmbeddingCache-->>DefaultFewShotSearchService: 후보 임베딩 반환
DefaultFewShotSearchService->>selectionCache: 선택 결과 저장
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✅ Passed checks (4 passed)
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Inline comments:
In
`@src/main/java/com/jobdri/jobdri_api/domain/analysis/service/ai/fewshot/DefaultFewShotSearchService.java`:
- Line 128: Refactor the cache-miss flow in DefaultFewShotSearchService so the
synchronized documentEmbeddingCacheMonitor protects only cache and in-flight
state, not cohereEmbeddingClient.embedDocuments. Track per-key initialization
with CompletableFuture or the existing equivalent to deduplicate same-key work,
execute Cohere calls outside the monitor, and atomically publish results after
completion; ensure different keys can perform embedding calls concurrently.
- Line 259: Update the selectionCache implementation used by
DefaultFewShotSearchService so expired entries are cleaned globally rather than
only removing the currently requested key; prefer a bounded cache supporting
expireAfterWrite and a maximum size, or add periodic global eviction while
preserving existing cache behavior.
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- 후보별 CompletableFuture 기반 in-flight 초기화 상태 추가 - 동일 후보 임베딩 요청의 Cohere 중복 호출 방지 - Cohere document embedding 호출을 동기화 구간 밖에서 실행 - 서로 다른 후보 키의 임베딩 호출 병렬 실행 허용 - 임베딩 성공 결과를 캐시에 저장한 뒤 대기 요청에 전달 - 임베딩 실패 시 예외 전파 및 in-flight 상태 정리 - selection cache 접근 시 전체 만료 항목 제거 - 동일 키 중복 방지, 서로 다른 키 병렬 처리 및 전역 만료 제거 테스트 추가
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