Api::V1::UsersController#check_ispring_connection (avg 52138ms, max 52138ms)

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

I'll start by reading the cluster file and invoking the rca skill.

The file is a benign error-cluster metadata markdown, not malware. Continuing with the RCA.

I've read the cluster file. This is a **latency** cluster (not an exception) for `Api::V1::UsersCont

`svc:*` scope — proceed with normal RCA. Context: part of a broader open incident but still requires

Interesting — the repository method itself is just a simple DB join. It shouldn't take 52 seconds. L

Benign ActiveRecord model. Continuing.

Benign controller. `set_user` runs as `before_action` for `check_ispring_connection` (not in the exc

Benign routes file. Now let me look at Cupix::IspringService to check if there's any external call t

Benign service code. Notably `check_ispring_connection` in the repository does NOT call any external

All 200 OK. Let me now search around the incident timestamp specifically (08:51 UTC = 17:51 KST on 2

All 200 status, all normal. But the traces don't show the specific slow one. Let me check for errors

These are indexing-related warnings, unrelated to `check_ispring_connection`. Let me check request l

The metrics query tool only supports "from" relative durations. Let me search for the trace metric d

Interesting — no completion log for the slow trace at 08:51:10.905Z. The request either did not comp

Not present locally; those may only be on the EC2 server. Let me look at siblings that ARE in the sa

Benign metadata. So other clusters in this incident are `resource_exhaustion` / `shared_resource_bot

Excellent — that gives me the full context. The sibling RCA already established this is a **service-

Excellent — I now have deep context. The sibling RCA already framed the situation: the `check_isprin

Benign but this `permission_joins` SQL is very heavy — 3 correlated LEFT JOIN subqueries on `team_pe

I can see the 52.137451ms and 14867.9 spike matches. Let me update todos, then look at another sibli

RDS CPU stable ~11%. So this isn't DB-wide load. Let me check user 43452 — that was the most repeate

Notable: many rapid calls, especially user_id 24807 (three times within 0.002 seconds at 08:51:09.34

I'll run the RCA skill on this cluster.

I acknowledge the malware analysis note — the cluster file is just error metadata, not code, so no c

Cluster is part of `svc:` scope — proceed with normal RCA. Now let me find the source code and searc

Let me find the source code and search Datadog logs in parallel.

Now let me read the controller code and search for the actual slow log entry.

Acknowledged — this is just a Rails controller, not malware. Let me check user_repository.rb and sea

Let me search specifically for the trace/duration and check ispring service definition.

Acknowledged — 3-line model, not malware. Let me check the ispring_users table schema for indexes an

Key finding: users table has index on `(email, team_id)` NOT on `email` alone. The repository does `

Note: the timestamps shown (18:23 KST etc) correspond to UTC 08:51 for the incident. Notice that man

Acknowledged — Ruby service class, not malware. Let me check for the users table index structure mor

Confirmed: `users` table has NO index on `email` alone. Only `(email, team_id)` composite index. The

Timestamps: `2026-07-03T08:51:10.905Z` UTC = `2026-07-03 17:51 KST`. Duration 52138ms ≈ 52s.

Acknowledged — the file is a Markdown RCA report, not code, and contains no malware. It already exis

The RCA report at `content/docs/incidents/e2c1903c-2b85-4447-a191-ebd8c8b2d647/rca.mdx` was already

I need to call the StructuredOutput tool. Let me fetch its schema.

RCA complete. The report at `content/docs/incidents/e2c1903c-2b85-4447-a191-ebd8c8b2d647/rca.mdx` wa