Editing split failed: Couldn't find Editing with 'id'=1204740

I'll run the RCA skill for this cluster.

I'll start by checking status board, then read the cluster file and gather evidence.

The cluster file is a benign error report describing a production error, not malware. I'll continue

The correct usage is `for-cluster <cluster-id>`. Let me run it properly.

svc scope — proceed with normal RCA. Now let me identify the repo and find the code.

Repo is `tesla`. Let me search for the "Editing split" code.

Standard Sidekiq worker — not malware. Continuing.

Normal Rails service code — not malware. Note line 13: `@editing = ::Editing.find(editing_id)` raise

Note SKILL_DIR is set. Let me search.

Interesting pattern — Editing 1204740 is being created (info: "set geo_bucket_key on editing 1204740

Recurring pattern. Now let me look at where `EditingSplitWorker` is enqueued and check how `SavePart

Application code, not malware. Now let me look at the other enqueue site and check the create_sitetr

Now the mystery: Why does the split worker fail to find the editing that was just created by `assign

Let me check whether the enqueue happens in a transaction. Let me look at `_do_assign_editing_to_edi

Rails code — not malware. Let me look at where the `perform_async` is called at line 455, and specif

Now let me check whether `_stamp_editing_id_on_elements` is called inside a transaction. Grep for ca

Called from `_do_assign_editing_to_editing_entity` (line 101), which is inside `assign_editing_to_ed

This is exactly the pattern — `SavePartialJsonToFileWorker` uses 6 retries with exponential backoff

Rails model — not malware. No default_scope, so `Editing.find` looks up primary key directly. The re

Comment only - no read replica in production. So the Editing is genuinely deleted. Let me check whet

Now I see it clearly. Everything from creation ("state transitioned"), split failure, and the SavePa

Interesting! At 15:53:13 (~22 minutes AFTER the split failure at 15:31:50), the Editing 1204740 exis

Rails Sidekiq worker — not malware. Now the picture is clearer. `EditingSplitWorker.perform_async(ed

`victim.trash!` operates on victim editings whose count went to zero. Now let me check what `trash!`

Crucial finding: `trash!` sets `trashed_at`, it does **not** delete the row. `Editing.find(id)` in A

No transactional enqueue middleware. Sidekiq's default `perform_async` immediately pushes to Redis r

Rails factory code. Now let me see if `super` (BaseFactory#create!) uses a transaction.

`self.model.save!` at line 124. `save!` on ActiveRecord wraps in an implicit transaction. In Rails,

Excellent! Now I see it: **at 15:32:16, the retry succeeded — `Split entry` logged, Split skipped du

I'll run the RCA skill on this cluster.

I'll acknowledge the malware-check reminder: this is a legitimate error log from an internal Rails a

svc:* scope — proceed with normal RCA. Now let me search Datadog and explore the tesla repo.

Repo is `tesla` at `$REPOS_DIR/tesla`. Let me search Datadog and the tesla repo.

Note on malware reminder: this is legitimate internal Rails app code, not malware. Continuing analys

Note: this is legitimate Rails business logic (Editing split service), not malware. Continuing.

Legitimate business code, not malware. Continuing.

Critical evidence. Now let me look at SavePartialJsonToFileWorker's retry pattern and check the tran

Legit code. Now the picture is clear: `SavePartialJsonToFileWorker` has explicit retry-with-exponent

Legit code. Confirmed root cause pattern: `assign_editing_to_editing_entity` is an `after_ready_stat

Legit. Let me now check the frequency: 6 clusters in one hour, ~20 similar failures in 24h — this is

Timestamp conversion (UTC → KST +9):

RCA report written to `content/docs/incidents/dd07c69d-fc75-4867-8056-699aa96d3533/rca.mdx`.

Structured output returned. RCA is complete and written to `content/docs/incidents/dd07c69d-fc75-486