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fix: catch unhandled rejection in worker lock-renewal timer#1567

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garrytan-agents:fix/worker-lock-renewal-crash
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fix: catch unhandled rejection in worker lock-renewal timer#1567
garrytan-agents wants to merge 3 commits into
garrytan:masterfrom
garrytan-agents:fix/worker-lock-renewal-crash

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@garrytan-agents

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Root Cause

Caught the crash in the act:

[unhandledRejection] Error
    at getConnection (db.ts:153)
    at executeRaw (postgres-engine.ts:4462)
    at renewLock (queue.ts:1026)
    at worker.ts:619

The per-job lock renewal runs in a setInterval callback (worker.ts:618). When PgBouncer drops/rotates the DB connection, renewLock → executeRaw → getConnection throws. Since this is a detached async context inside setInterval, the rejection is unhandled and kills the worker process with exit code 1.

This explains the pattern:

  • Workers crash every ~30 min (PgBouncer connection lifetime)
  • All jobs show as "completed" (the crash happens between lock renewal ticks, not during job execution)
  • stableRunResetMs (5 min) resets crash counter because each worker runs 30+ min → never hits max_crashes
  • 39 crashes/day, every single one code=1 (runtime_error)

Fix

Wrap the lock renewal await in try/catch:

  • On transient DB failure: log warning, retry on next interval tick
  • After 3 consecutive failures: treat as lost lock, abort the job (stall detector requeues it)
  • Worker process stays alive through DB blips

Impact

Eliminates the #1 source of supervisor crashes. Zero-risk: the fallback behavior (abort after 3 failures) is strictly better than the current behavior (process death on first failure).

root and others added 3 commits May 24, 2026 09:16
The judgeSignificance trimming (slice at 4000 chars) could split a
UTF-16 surrogate pair when an emoji sits exactly at the boundary,
producing a lone high surrogate that Anthropic's JSON parser rejects
with 'no low surrogate in string'.

Add safeSliceEnd() helper that backs up by one char when the cut lands
between a high and low surrogate. Apply to:
- judgeSignificance transcript trimming (the direct cause)
- findBoundary hard-split fallback (defense-in-depth)

Fixes: dream cycle SYNTH_PHASE_FAIL on 2026-05-24 caused by
🤖 emoji at pos 3999 in telegram/2026-05-20-topic-1-topic-1.md
The per-job lock renewal runs in a setInterval callback. When PgBouncer
drops the DB connection (transient network blip, pool rotation, etc.),
renewLock → executeRaw → getConnection throws. Since this runs in a
detached async context inside setInterval, the rejection is unhandled
and kills the entire worker process with exit code 1.

This is the root cause of the 39 crashes/day pattern: workers run ~30 min
(time for PgBouncer to rotate the connection), then crash on the next
lock renewal tick. The supervisor respawns, but stableRunResetMs (5 min)
resets the crash counter since each worker runs 30+ min — so it never
triggers max_crashes protection.

Fix: wrap the lock renewal in try/catch. On transient DB failure, log a
warning and retry on the next interval tick. After 3 consecutive failures,
treat as a lost lock and abort the job (stall detector will requeue it).
The worker process stays alive.
@garrytan

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Superseded by #1572: v0.41.26.1 lock-renewal cathedral wave.

Thanks for the original fix — your try/catch shape made it into the new wave verbatim, with co-author attribution preserved on the commit. Codex outside-voice review caught 8 additional gaps that the inside-review missed (notably: the count-based threshold had a 15-second window where another worker could reclaim the row BEFORE this worker aborted, and the stored executeJob.finally() promise was a second unhandledRejection vector that the headline try/catch didn't cover). The new wave closes the entire bug class structurally — pure-function extraction, time-based abort, infrastructure-reason guard, audit JSONL with privacy redactor, CI shape guard.

The safeSliceEnd surrogate-pair fix from synthesize.ts is a separate concern (different bug class, different test surface) and is filed as TODO-LR-1 in TODOS.md for its own follow-up PR — would love your help on that one too if you're up for it. Closing this PR to keep the queue clean.

@garrytan garrytan closed this May 27, 2026
garrytan added a commit that referenced this pull request May 28, 2026
…y (supersedes #1567) (#1572)

* v0.41.26.1 fix: lock-renewal cathedral — closes ~39 worker crashes/day (supersedes #1567)

Production worker daemons against Supabase / PgBouncer were crashing
~39 times/day with `unhandledRejection at renewLock`. PR #1567
proposed the right try/catch shape; this wave incorporates it and
closes the entire bug class (4 inside-review + 8 outside-voice
findings absorbed via 9 locked design decisions).

What's fixed:

- `setInterval(async () => await renewLock(...))` replaced with a
  sync wrapper around the new pure `runLockRenewalTick` function.
  No more unhandled rejections escaping the timer callback.
- Second crash vector closed: `.catch()` on the stored
  `executeJob(...).finally(...)` promise so failJob/completeJob
  throws during the same outage can't propagate to
  `process.on('unhandledRejection')`.
- Per-call `Promise.race` timeout (default `lockDuration/3`) bounds
  hung renewLock calls so the re-entrancy guard can't wedge
  indefinitely.
- Time-based abort (NOT count-based) so the worker releases its
  lock BEFORE another worker can reclaim. With the prior 3-strike
  count + 30s lockDuration, a 15s window let other workers race.
- Infrastructure aborts (`lock-renewal-failed`, `lock-lost`) don't
  burn job attempts — `executeJob`'s catch consults the exported
  `INFRASTRUCTURE_ABORT_REASONS` set and skips `failJob` so the
  stall detector reclaims cleanly.
- Universal grace-eviction: 30s force-evict safety net now fires
  for ANY abort reason, not just `job.timeout_ms`.

What's added:

- `src/core/minions/lock-renewal-tick.ts` (NEW): pure extracted
  state-machine function + env-knob resolver. Three operator-tunable
  knobs via env (max-failures-for-audit, call-timeout-ms,
  safety-margin-ms) with stderr-warn-once on bad input + default
  fallback.
- `src/core/audit/lock-renewal-audit.ts` (NEW): sibling of
  `batch-retry-audit.ts`. Four outcomes: failure /
  success_after_failure / gave_up / executeJob_rejected. JSONL at
  `~/.gbrain/audit/lock-renewal-YYYY-Www.jsonl`.
- `src/core/audit/redact-connection-info.ts` (NEW): shared privacy
  helper. Strips Postgres URLs, host=, user=, password=, IPv4 from
  error messages before they hit audit JSONL. Wired into BOTH the
  new lock-renewal audit AND the existing batch-retry audit
  (privacy backfill — same risk class).
- `scripts/check-worker-lock-renewal-shape.sh` (NEW): CI guard
  wired into `bun run verify`. Asserts the v0.41.22.1 bug pattern
  (`lockTimer = setInterval(async ...)`) stays absent AND the pure
  function call site survives refactors. Bug-pattern-specific so it
  doesn't fight legitimate refactors (codex C12).

Tests: 64 new cases across 5 new test files. 182 existing minion +
worker tests still pass. All hermetic — no PGLite, no real network,
no `mock.module`.

Plan + 9 decisions + codex outside-voice review at
~/.claude/plans/system-instruction-you-are-working-humming-nygaard.md

Closes #1567 (incorporates the contributor's try/catch shape; closes
the bug class structurally).

Co-Authored-By: @garrytan-agents <noreply@github.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: fill A-H gaps for v0.41.26.1 lock-renewal cathedral

The original v0.41.26.1 wave shipped 64 hermetic unit tests on the
pure tick function, audit primitives, and redactor. Post-ship audit
flagged 8 wiring gaps the pure tests can't see — A (launchJob
wiring), B (executeJob skip-failJob), C (.catch on stored promise),
D (INFRASTRUCTURE_ABORT_REASONS export), E (universal grace-evict),
F (executeJob_rejected end-to-end), G (re-entrancy guard at worker
layer), H (gold-standard E2E regression).

Now closed:

- **test/worker-lock-renewal-e2e.serial.test.ts** (1 test, gap H):
  the headline gold-standard regression. Real PGLite + real
  MinionWorker + executeRaw wrap that injects renewLock failures on
  demand. Pins that the worker process DOES NOT crash via
  unhandledRejection under sustained renewLock throws, the handler
  observes abort.signal.aborted = true with reason
  'lock-renewal-failed', and the audit JSONL contains both `failure`
  and `gave_up` events. The exact v0.41.22.1 production bug class.
  Quarantined to its own file because bun:test serial + PGLite has an
  unresolved interaction with multiple MinionWorker-driven tests in
  the same file (second test's queue.add hangs indefinitely).

- **test/worker-lock-renewal-shape.test.ts** (18 tests, gaps A-G):
  source-shape behavioral pins. Greps worker.ts function bodies for
  the patterns the locked decisions promised: launchJob calls
  runLockRenewalTick + resolveLockRenewalKnobs + uses
  lockRenewalAudit; tickInFlight declared and gated correctly; stored
  executeJob promise has .catch with logExecuteJobRejected + console
  stderr; abort.signal.addEventListener fires for any abort (not just
  timeout_ms); INFRASTRUCTURE_ABORT_REASONS used inside executeJob's
  catch with return-early shape. Bug-pattern-specific so a refactor
  that genuinely improves the shape passes; a refactor that
  accidentally strips a guarantee fails loud.

All 83 lock-renewal wave tests pass in 5.2s. 205 existing minion +
worker tests still green. No production code changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix: typecheck errors in worker-lock-renewal-e2e.serial.test.ts

CI verify failed on the new E2E gap-fill test (commit a8b282d) due
to two TS errors that bun's runtime accepts but tsc rejects:

1. line 92: `originalExecuteRaw(sql, ...args)` with `args: unknown[]`
   — TS can't prove args has <=2 elements, so the call site looks
   like 1+1+N args against a function that accepts 1-3. Fixed by
   destructuring the wrap params explicitly: `(sql, params?, opts?)`
   matching the executeRaw signature, then calling
   `originalExecuteRaw(sql, params, opts)` with named args.

2. line 145: `expect(abortReason).toBe('lock-renewal-failed')` where
   `abortReason: string | null = null`. TS narrows the variable to
   `null` because the closure assignment in worker.register isn't
   observable to the inferrer. bun:test's `.toBe` overload then
   picks the null variant and rejects the string literal. Fixed by
   `as unknown as string` cast — the preceding `handlerAbortObserved`
   assertion guarantees we entered the branch where abortReason was
   assigned. Documented inline.

Local verify (29 checks) now green; E2E test still passes in 5.0s.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: @garrytan-agents <noreply@github.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
mgunnin added a commit to mgunnin/gbrain that referenced this pull request May 28, 2026
* upstream/master:
  v0.41.26.1 fix: lock-renewal cathedral — closes ~39 worker crashes/day (supersedes garrytan#1567) (garrytan#1572)
  v0.41.26.0 fix: dream --source + ingest junk titles + emoji-crash (supersedes garrytan#1559, garrytan#1561) (garrytan#1571)
  v0.41.25.0 perf(sync): batched deletes + global page-generation clock (supersedes garrytan#1538) (garrytan#1566)
  v0.41.24.0 fix(conversation-parser): threshold gates + bold-paren-time pattern — 20,167 Circleback messages unblocked (closes garrytan#1533) (garrytan#1543)
  v0.41.23.0 feat: extract operator surfaces + pack-driven extractables (garrytan#1541)
  v0.41.22.1 feat: brainstorm/lsd judge fixes (closes garrytan#1540 end-to-end) (garrytan#1562)
  v0.41.22.0 feat: type-unification cathedral — 94 types → 15 canonical (closes garrytan#1479) (garrytan#1542)
  v0.41.21.0 feat(ops): 5 daily-driver pains fixed in one wave (garrytan#1545)
  v0.41.20.0 feat: gbrain status + doctor --scope=brain (fix wave 2: items garrytan#6 + garrytan#7) (garrytan#1544)
  feat: v0.41.19.0 Supavisor Retry Cathedral (garrytan#1537)
  v0.41.18.0: gbrain onboard — the activation surface gbrain didn't have before (garrytan#1521)
  v0.41.17.0 feat: --workers N on every bulk command + facts dim doctor parity (garrytan#1519)
  v0.41.16.0 feat: conversation parser cathedral + progressive-batch primitive (closes garrytan#1461) (garrytan#1510)
  v0.41.15.0 feat(sync): --timeout + --max-age + partial status (closes garrytan#1472 RFC) (garrytan#1506)
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2 participants