Elasticsearch connection pool exhaustion — concurrent bulk indexing
Service
cupixworks-worker
Occurrences
18,230
Status
Reported
Confidence
85%
Actionability
28%
Cluster ID
e95554ab-f082-45af-8cbf-0a122daf46ab
First Seen
2026-04-09 04:30 UTC
Last Seen
2026-08-04 21:36 UTC
Actions
Elasticsearch connection pool exhaustion — concurrent bulk indexing
What Happened#
2026-05-22 06:57~07:00 UTC에 cupixworks-worker(us-west-2)에서 Elasticsearch connection pool이 완전 고갈되어 Feed#_index_document와 EditingSplitWorker#perform에서 연쇄적으로 실패가 발생했다. 동일 호스트에서 총 8건의 connection pool timeout 에러가 기록되었으며, 그 중 일부는 Sidekiq 재시도 소진 후 death handler에 도달했다.
Quick Facts#
| Field | Value |
|---|---|
| exception.class | ConnectionPool::TimeoutError |
| exception.message | Waited 7 sec, 0/10 available |
| top_frame | connection_pool-2.5.0/lib/connection_pool/timed_stack.rb:78 |
| runtime | Ruby (Rails) / Sidekiq worker |
| deploy | production-us-west-2-20260519T0920Z0-3e770a15-cupixworks |
| env | production, us-west-2 |
Timeline#
- 06:54~06:57 UTC — 대량 indexing 작업 진행 (CreateSitetrackEditingEntitiesWorker, BulkPartialIndexWorker, bulk_partial_save_to_file)
- 06:57:46 UTC — EditingSplitWorker에서 최초 connection pool timeout 발생 (editing_id: 1115084, 1115090)
- 06:58:16~06:58:54 UTC — EditingSplitWorker 반복 실패, Sidekiq death handler 발동
- 06:59:32~06:59:58 UTC — Feed#_index_document에서도 동일 에러 발생 (이 클러스터의 대표 에러)
Scoring#
Confidence 85% · Actionability 28%
Confidence#
| Dimension | Score | Detail |
|---|---|---|
| Evidence completeness | 5/5 | 17 code refs, 5 log queries |
| Code path explicitness | 3/3 | 17 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 | 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 |