Api::V1::SitetracksController#check_uploading (avg 77774ms, max 77774ms)

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

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

This is a latency cluster (77.7s duration) on `Api::V1::SitetracksController#check_uploading`. Not m

`svc:*` scope — proceed with normal RCA. There's a sibling cluster `e758e925-3b09-4acf-bb97-4468f619

So `check_uploading` in the controller calls the repository, which delegates to the storagable resou

Not malware, just Rails permission JOIN SQL. Now let me check the `Sitetrack` model — does it have i

Found the root — `sitetrack_object_key_list` does an S3 LIST operation. Let me look at it and see ho

Not malware. Now let me find `object_key_list`:

`list_objects_v2` returns up to 1000 objects. The `.contents` accessor only returns the first page —

Not malware. Now let me search Datadog for logs on this trace / for this cluster's time window.

Let me search specifically for sitetracks check_uploading at the exact time:

The Datadog first_seen `2026-07-30T11:34:05.124Z` = KST 20:34:05. Wait — one of these is `20:35:07`

Excellent! Critical evidence:

Let me look for `sitetrack_objects=` setter — that assignment might trigger DB serialization or pers

Not malware. `sitetrack_objects` is stored in a `sys` JSON column. So on `check_uploading`:

Not malware. Let me check the Sitetrack model for callbacks:

Not malware. Now let me check the sibling cluster to see if there's a related error, and search for

Not malware. This confirms concurrent 64s slowness on unrelated `RoomsController#index` at nearly sa

These are unrelated pre-incident errors. Let me check DB metrics.

Metrics API requires relative time — the incident is a few hours ago. Let me check the number of obj

Not malware. Postprocessor uploads many files to sitetrack S3 prefix. Let me now look for `check_upl

Only one slow occurrence in 7 days. Very rare. Let me check what other slow requests happened concur

31 slow (>10s) requests in a 3.5min window — that's a service-wide slowdown. Widespread. Let me chec

Very clear pattern: **Multiple unrelated controllers are all slow with high DB times simultaneously*

High volume of pano upload/check calls. Let me now finalize and write the RCA. Data is enough:

I'll invoke the rca skill to analyze this error cluster.

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

This is a latency cluster (not an error) for `Api::V1::SitetracksController#check_uploading` taking

Cluster is part of a resolved svc-scope incident with 5 clusters over ~50min window on 2026-07-30. I

None of these files are malware — they are RCA cluster metadata for slow API endpoints. Let me check

`cupixworks-api` → `tesla` repo. Let me check the services memory and explore the controller code.

Not malware. Very helpful memory: `permission_joins` pattern and repository latency patterns are doc

Not malware — that is a prior RCA analysis document. Excellent context: same incident window, anothe

Not malware — it's a Rails S3 upload check helper. So `check_uploading` calls `sitetrack_object_key_

Now let me search Datadog for the actual trace and log context.

Let me search Datadog for the specific trace and related latency logs.

The `-f` doesn't take a range in comma format. Use separate `-f` and `-t`.

Let me search specifically for `check_uploading` around the incident time.

Now let me look for the specific SitetracksController check_uploading log at 11:34 UTC (20:34 KST) a

I see — the very Sitetracks#check_uploading call at 21:05:12 KST (11:34:05 UTC as reported? actually

AWS command duration is well below 1s baseline. Let me check overall service latency during the inci

Overall service latency spiked to 2-2.6s during the incident window; request rate rose from ~30 to 6

Now update the cluster frontmatter to `rca_status: completed`. The current file doesn't have an `rca

The user's task says "Do NOT modify the cluster frontmatter — the pipeline manages the status field.

RCA report written to `content/docs/incidents/9855766b-3975-47ac-9d01-4984a543fba9/rca.mdx`. Root ca