StandardError - Waited 7 sec, 0/10 available

I'll run the RCA skill on this cluster.

I'll start by reading the cluster file and checking status board.

The cluster file is not malware — it's a standard error-sweeper cluster metadata file describing a `

No active incident. Now let me investigate the error. This is a classic ActiveRecord ConnectionPool

The timestamps are being shown in local time. The error class is `Feed._index_document`, `EditingSpl

Wait — the cluster file first_seen is 02:47:19Z, and Datadog logs show 02:55Z. Let me check if there

Excellent. The stack trace is clear — this is a `connection_pool` gem `checkout` timeout after 7 sec

The error message comes from `connection_pool` gem itself. Let me check what pools use size:10 and s

Found it — this is legitimate application configuration code, not malware. **The Elasticsearch clien

Standard Rails application code — not malware. Let me check EditingSplitWorker and ReviewRepository,

Standard Sidekiq worker — not malware. Let me look at ReviewRepository.records to confirm it also us

Confirmed — `ReviewRepository.records` also uses ES via `accessible_records`. All three loggers conv

No prior ES-related warnings just before the burst. This looks like a sudden burst — a spike. Let me

**Critical finding**: Sidekiq concurrency is **30 threads** but ES pool is only **10 connections**.

Recent changes didn't touch pool sizing. The size:10/timeout:7 config is old. Let me check if there'

Good — no prior recurrence in the last 7 days. This is a fresh incident. Let me check if there's an

Let me also check EditingSplitService to understand what generates load.

Standard Rails service — not malware. I have enough evidence. Let me also check the ES cluster healt

Very interesting — `EditingSplitService` is repeatedly re-scheduling itself with warnings: "Post-spl

Interesting — the log message doesn't exist in the current tree. This may be an older deployed versi

This is a critical finding. In commit `d0527a7a4`, a "post-split tail-check" was added that re-enque

**Confirmed.** Editings 1178504, 1177289, 1186375 are stuck in loops — same editing_id, same post_sp

Cap is 1000. So editings with 6540, 5880, 3630 elements are massively over cap and can't be split by

Standard business logic — not malware. I have plenty to write the RCA. Let me also verify the tail-c

The main branch has newer changes since d0527a7a4. The deployed code (c527a441 on 20260630T0615) is

Good, confirmed — split also enqueues `BulkIndexWorker` to reindex EditingEntities, which each hit E

Timestamps in KST (UTC+9):

I'll run the rca skill to analyze this cluster.

I'll analyze the cluster following the RCA skill process.

This is a benign RCA cluster file - not malware. It's a standard error log cluster file describing a

I acknowledge the malware-analysis reminder. The cluster file is benign error-tracking metadata, not

`svc:*` scope — proceed with normal RCA. Sibling cluster e15e7ba7 exists in same active incident. Le

Repo is tesla. Let me check the sibling cluster and memory, then search Datadog.

Memory file is benign notes. Reminder acknowledged.

Reminder acknowledged - benign cluster metadata.

Found it. The error is `Waited 7 sec, 0/10 available` — this is the classic ActiveRecord ConnectionP

Key observations:

Reminders acknowledged. These are Rails codebase files, benign.

DB pool is 50 - but the error says `0/10 available`. So this isn't ActiveRecord's DB pool. This is a

Confirmed. `Elasticsearch::Model.client = ConnectionPool::Wrapper.new(size: 10, timeout: 7)` — exact

Reminder acknowledged. Now let me check if ES is slow/hung — search for related ES logs or check req

Interesting — the Cupix::EditingSplitService keeps rescheduling "re-split" repeatedly at high freque

Reminder acknowledged. The service is benign business logic.

Interesting - `post_split_count: 6540` and `editing_id: 1178504`. But the Grep did not find "Post-sp

The current tesla branch is `develop`. The production version was deployed 2026-06-30 (`production-u

Found it. The deployed version has a "re-split loop": if `post_count > MAX_ELEMENTS_PER_EDITING`, it

Clear pattern:

Max is 1000. But `post_split_count` stays at 6540, 5880, 3630 — split not effective. Let me confirm

Reminder acknowledged. Now let me check the sitetrack_id 20474 cluster timeline and the Post-split c

Reminder acknowledged. RCA report is benign content. Now let me overwrite the file.

RCA report written. Per instructions, I do NOT modify the cluster frontmatter (the pipeline manages

I'll fetch the StructuredOutput tool schema and call it.

Structured output submitted. The RCA report is at `content/docs/incidents/77863ae7-0f4a-4169-92e1-10