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Rails worker saturation from concurrent bulk uploads

Service
cupixworks-api
Occurrences
2
Status
Reported
Confidence
85%
Actionability
28%
Cluster ID
4bc4a6bb-c329-449b-8ed4-28272df1eae5
First Seen
2026-06-03 22:15 UTC
Last Seen
2026-06-03 22:31 UTC
Actions

Rails worker saturation from concurrent bulk uploads

What Happened#

2026-06-04 07:31 KST에 cupixworks-api의 Api::V1::AssetsController#download 엔드포인트에서 3427ms의 응답 지연이 감지되었다. us-west-2 리전에서 발생하였으며, 동일 시간대에 해당 리전 전반에 걸친 API 서버 혼잡이 확인되었다.

Quick Facts#

Field Value
resource_name Api::V1::AssetsController#download
HTTP status 302 (redirect)
duration 3424.9ms
db_time 195.96ms
top_frame app/controllers/api/v1/assets_controller.rb:51
env production, us-west-2

Affected Teams#

Team / Domain Error Count Impact
cupixworks-api (us-west-2) 50+ slow requests Asset download 응답 지연으로 자동화 클라이언트 및 사용자의 파일 다운로드 대기 시간 증가

Timeline#

  1. 2026-06-04 07:07 KST — us-west-2 리전에서 slow download 요청 시작 (첫 번째 >3000ms 요청 감지)
  2. 2026-06-04 07:10 KST — 최대 지연 4701ms 기록 (asset hdmyaith3ybf)
  3. 2026-06-04 07:31 KST — 본 클러스터의 대표 trace 발생 (3424.9ms, asset 1fnqt8vzwq3h)
  4. 2026-06-04 07:52 KST — 관련 NotificationService 에러 발생 (별도 이슈)
  5. 2026-06-04 16:04 KST — RCA 수행

Scoring#

Confidence 85% · Actionability 28%

Confidence#

Dimension Score Detail
Evidence completeness 5/5 8 code refs, 6 log queries
Code path explicitness 3/3 8 file:line refs
Log evidence 3/3 section, query, pattern
RCA structure 3/3 3/3 sections
Revision history 0/3 0 revision(s)
Agent execution 3/3 success

Actionability#

Dimension Score Detail
Fix complexity 1/5 critical
Affected files 1/5 12 file(s)
Single repo 1/3 5 service(s)
Immediate actions 0/3 absent
Testability 0/3 no test info
External dependency 1/3 external deps found
Data migration 3/3 no migration