S3 transient rate-limit (SlowDown 503)
Service
cupixworks-excon
Occurrences
72
Status
Reported
Confidence
80%
Actionability
44%
Cluster ID
55dad51d-20fe-479d-819f-81f11b0dba9b
First Seen
2024-09-16 17:22 UTC
Last Seen
2026-08-04 06:38 UTC
Datadog
SlackActions
S3 transient rate-limit (SlowDown 503)
What Happened#
tesla (Rails, cupixworks-api) 가 CarrierWave storage :fog (fog-aws → Excon) 로 썸네일 이미지를 static S3 버킷(cupix-tesla-static)에 PUT 업로드하던 중, S3 가 503 Service Unavailable (빈 body, Server: AmazonS3) 을 반환했다. 이는 Datadog Error Tracking 에만 존재하는 이슈로, cupixworks-excon 이라는 service 는 실제 앱이 아니라 APM 계측용 adapter 이름이다. 2024-09-28 부터 누적 86 건, 최근 발생은 2026-08-04 로 저빈도 산발 발생이다.
Quick Facts#
| Field | Value |
|---|---|
| exception.class | Excon::Error::ServiceUnavailable |
| exception.message | Expected(200) <=> Actual(503 Service Unavailable) |
| top_frame | config/initializers/carrierwave.rb (fog storage) / app/uploaders/thumbnail_uploader.rb |
| env | production-us (s3.us-west-2.amazonaws.com, host 10.1.82.144) |
Affected Teams#
| Team / Domain | Error Count | Impact |
|---|---|---|
| cupixworks-api (썸네일 업로드) | 86 (2024-09 이후 누적) | 개별 썸네일 업로드가 산발적으로 실패. 재시도/재업로드로 회복 가능, 지속적 사용자 영향 없음 |
Timeline#
- 2024-09-28 14:49 KST — 최초 발생 (Representative Error 의 S3
Date헤더Sat, 28 Sep 24 05:49:02 GMT기준). PUT to/cupix-tesla-static/uploads/tmp/.../vr5ysr8nmiez_thumbnail.jpg→ 503. - 2024-09-28 ~ 2026-08-04 — 동일 클래스 산발 재발, 누적 86 건.
- 2026-08-04 12:28 KST — 최근 발생 (
last_seen). Datadog 로그(error/warn/info)에는 대응 항목 없음 — Error Tracking 전용.
Scoring#
Confidence 80% · Actionability 44%
Confidence#
| Dimension | Score | Detail |
|---|---|---|
| Evidence completeness | 5/5 | 4 code refs, 3 log queries |
| Code path explicitness | 3/3 | 4 file:line refs |
| Log evidence | 2/3 | section, query |
| 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 | 5/5 | trivial |
| Affected files | 1/5 | 13 file(s) |
| Single repo | 1/3 | 3 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 |