Matt Aitken
90bbbd1c44
## Summary Second class of poisoned-row failure in the runs replication path. PR #3708 plugged lone UTF-16 surrogates; this one handles bare JSON integer literals outside ClickHouse's `Int64`..`UInt64` range. Recovery stays purely reactive — the existing `sanitizeRows` walker just gains an extra branch, so the hot replication path pays nothing on healthy rows. Fixes the still-firing customer-facing symptom from [TRI-9755](https://linear.app/triggerdotdev/issue/TRI-9755): `scan-social-profiles` runs continued to be stranded in `EXECUTING` on the Tasks page after #3708 deployed. CloudWatch showed `Dropped batch — ClickHouse JSON parse error but sanitizer found nothing to fix` firing **8/8 times** since the previous deploy (zero successful sanitizations). Root cause: upstream JS Number precision loss on a 21-digit Google Plus ID (`117039831458782873093` → `117039831458782870000`) — the precision-lossy value still serialises as a bare integer that exceeds `UInt64.MAX`, which ClickHouse rejects with `INCORRECT_DATA`. ## How the bug ships The customer task emits an output containing a Poshmark profile's `spec_format`: ```json {"key":"gp_id","proper_key":"Gp Id","value":117039831458782870000,"type":"int"} ``` That value is `1.17e20` — comfortably above `UInt64.MAX` (`1.84e19`) but comfortably below `1e21`. `Number.prototype.toString` only switches to exponential form at `|value| >= 1e21`, so `JSON.stringify` emits the bare token `117039831458782870000` and the ClickHouse `JSON(max_dynamic_paths)` column fails with: ``` Code: 117. DB::Exception: Cannot parse JSON object here: {…}: (while reading the value of key output): (at row 1) : While executing ParallelParsingBlockInputFormat. (INCORRECT_DATA) (version 25.12.x) ``` Same error verbatim as prod. The same number quoted (`"117039831458782870000"`) inserts fine — ClickHouse's dynamic JSON column accepts a `String` subtype on the same path. ## What changed `apps/webapp/app/v3/eventRepository/sanitizeRowsOnParseError.server.ts`: - New private `isUnsafeJsonInteger(value)` helper — true iff `value` is a finite integer-valued JS Number where `|value| < 1e21` (so `JSON.stringify` emits integer form, not exponent) **and** `value` falls outside `[Int64.MIN, UInt64.MAX]`. - `sanitizeUnknownInPlace` gains a number-branch: when the predicate holds, replace the Number with `String(value)`. The downstream JSON column dynamic-types the path as String for that row — fine, since the value was already precision-lossy upstream (no JS Number above 2^53 is numerically meaningful anyway). - Float-valued numbers, large floats (>= 1e21), NaN and Infinity are left alone — `JSON.stringify` emits them with exponents or as `null`, both of which ClickHouse accepts. `apps/webapp/test/sanitizeRowsOnParseError.test.ts`: four new unit tests + an extension to `sanitizeRows` covering surrogate + integer fixes counted together across rows. The unit suite now covers: - Positive value above `UInt64.MAX` (`117039831458782870000` — the actual prod value) - Negative value below `Int64.MIN` - Boundary values pass through (`42`, `Number.MAX_SAFE_INTEGER`, `2^63`) - Non-integer numbers untouched (floats, `1e25`, NaN, Infinity) - The actual `scan-social-profiles` nested shape — finds the offending `gp_id` deep inside `output.data.profiles[].spec_format[].platform_variables[].value` `.server-changes/runs-replication-bigint-recovery.md` — release notes entry. ## Why reactive, not pre-flight `#prepareJson` runs millions of times per day on the replication hot path. Walking every JSON tree to look for oversized integers would add bounded-but-real CPU on every healthy row. `sanitizeRows` only fires after a ClickHouse parse-error rejection, which is a few times a day platform-wide. Extending it costs effectively zero on healthy traffic and gains us recovery on the rare poisoned row. ## Verification - Reproduced 1:1 in a throwaway Docker `clickhouse/clickhouse-server:25.12.11.4` (closest available to the prod `25.12.1.1579` build). Pre-sanitize JSON fails with the exact prod error; post-sanitize JSON inserts cleanly and the row is readable with `gp_id` stored as a String subtype. - `pnpm --filter webapp exec vitest run test/sanitizeRowsOnParseError.test.ts` — 22/22 passing (18 existing + 4 new). - `pnpm run typecheck --filter webapp` — clean. ## Test plan - [x] `pnpm run typecheck --filter webapp` - [x] Unit tests pass against new + existing cases - [x] End-to-end Docker ClickHouse repro confirms recovery - [ ] Post-deploy: confirm `Sanitizing batch after ClickHouse JSON parse error` warns fire instead of `Dropped batch …` errors when `scan-social-profiles` outputs trip CH again - [ ] Post-deploy: confirm `permanentlyDroppedBatches` counter stops climbing in `/stp/trigger-app-prod/ecs/replication/service-container/process-logs` ## What this does NOT do - Doesn't backfill the ~120k+ existing stranded `EXECUTING` rows in production. Same as #3708 — that needs a reconciliation/backfill sweep (separate ticket — TRI-9755 fix #3). - Doesn't address the upstream root cause (the customer task emitting a JS-Number-precision-lossy big int). That's a customer-task concern; our replication path needs to be robust to whatever shape arrives. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
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