Matt Aitken
2cac63f13a
## Problem Several display/grouping issues in the **Errors** feature, all rooted in how the ClickHouse error materialized views (`errors_mv_v1`, `error_occurrences_mv_v1`) read the stored error JSON produced by `parseError`: 1. **Messageless errors show "Unknown error".** An empty message falls straight through `coalesce(nullIf(message,''), 'Unknown error')` to the literal, even though the error's class `name` is available (e.g. an Effect tagged error `ListMessagesError` with no message). 2. **Unrelated errors collapse into one group.** `calculateErrorFingerprint` keys on `type : message : stack`, where `type` is always the union tag (`BUILT_IN_ERROR`, …), `message` is empty, and the stack isn't read — so every messageless built-in error (and every string/custom error) hashes to the same constant input → one fingerprint. 3. **error_type shows the internal tag.** `coalesce(type, name, …)` always resolves to `type` (always present), so the column shows `BUILT_IN_ERROR` instead of the real class name. 4. **Stack traces never populate.** The MVs read `error.data.stack`, but the serializer stores the trace under `stackTrace` — so the column is always empty. ## Fix All display changes are `ALTER TABLE … MODIFY QUERY` on the two views (migration `035`); the fingerprint change is in the webapp. - **Fingerprint** (`errorFingerprinting.ts`): fall back **message → name → raw**. Messageless errors now group by class name (or raw value for non-Error throws); message-bearing errors are **unchanged** (short-circuits at `message`), so existing groups don't split — only currently-messageless errors get their own group going forward. - **error_message**: same `message → name → raw` fallback before `'Unknown error'`. - **error_type**: coalesce `name → code → 'Error'` (drops the reliance on the union tag). Built-in → class name, internal → `code`, string/custom → `Error`. - **stack trace**: read `error.data.stackTrace`. Bounded as before (serializer caps 50 frames / 1024 chars per line; MV clips to 2000 chars). ## Migration notes - `MODIFY QUERY` swaps the view query in place (no drop/recreate gap); Down restores the previous query. - **Existing rows are left unchanged** — changes apply only to rows inserted after the migration. No backfill. ## Tests `errorFingerprinting.test.ts` — 57 pass, incl. new cases for messageless class names, string/custom raw values, and stability of message-bearing fingerprints. Fixes the display-derivation half of TRI-11938 (error_type + stack trace); relates to TRI-9254 and TRI-9250.
476 B
476 B
area, type
| area | type |
|---|---|
| webapp | fix |
The Errors page now shows better details for each error. Errors that don't carry a message — such as errors thrown without a message, or values thrown that aren't Error objects — get a meaningful title instead of all reading "Unknown error", and are grouped by their name (or value) rather than collapsed into a single group. The error type now shows the actual error name, and stack traces now appear where previously they were missing.