CR: fix/heartbeat-retry-1022 by ng · Pull Request #33 · ng/core

ng · 2026-10-23T05:11:46Z

Proxy of sleepypod#865 for CodeRabbit review.

Heartbeat outages now make at most one failing transaction per call and back off for five seconds after that transaction completes. Pending chunks retain order, recover in order, and retain the existing bounded queue policy; reconnect accounting only advances on actual attempts.

Validation: 286 piezo-processor tests passed using locked dependencies, including synthetic database-locked and I/O-outage regressions, recovery ordering, reconnect cadence and queue overflow. Coverage: main.py 83.5% combined lines/branches; module aggregate 67.5% includes the unused prototype. New retry/drain lines are covered. No live pod outage was induced.

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Pick the snippet that matches your pod. Already-installed pods can't use the curl bootstraps below — sleepypod's egress firewall DROPs github.com, and the script that knows how to unblock WAN is the very file curl is trying to fetch. Use sp-update instead; it's on disk and opens WAN as its first step.

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🎯 Pin to this exact build (run 40142763210 · 8e2714c) — fresh-pod path, locked to one CI artifact for reproducible review:

curl -fsSL https://raw.githubusercontent.com/ng/core/8e2714c0f486938dab4efb67fc2c154027e7cac5/scripts/install \
  | sudo bash -s -- \
      --branch fix/heartbeat-retry-1022 \
      --artifact-url 'https://nightly.link/ng/core/actions/runs/40142763210/sleepypod-core.zip'

🧊 Artifact: sleepypod-core · self-destructs in 30 days 💥

Summary by CodeRabbit

Bug Fixes
- Failed heartbeat records are retried after a 5-second delay, helping preserve activity during temporary database interruptions.
- Pending records are processed in order. A failed write pauses further writes until the retry interval expires, and the queue is limited to 30 records.
- Retries continue during idle polling. At shutdown, pending records receive a final bounded save attempt.

coderabbitai · 2026-10-23T05:11:53Z

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Reviewing files that changed from the base of the PR and between 3e34af9 and 8e2714c.

Files selected for processing: 3

modules/piezo-processor/main.py
modules/piezo-processor/test_main.py
src/demo/tests/biometrics.referenceVitals.test.ts

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Walkthrough

BeatFront queues failed heartbeat writes and retries them after a five-second delay. Polling and shutdown invoke retry attempts. Biometrics reference-vitals tests now use file-level fake-timer hooks with a fixed time.

Changes: Heartbeat write retry

Layer / File(s)	Summary
Queueing and retry behavior `modules/piezo-processor/main.py`, `modules/piezo-processor/test_main.py`	`BeatFront` accepts an injectable clock, queues chunks, retries failed writes after five seconds, and drops the oldest chunks when the queue exceeds 30. Tests cover retry timing, recovery, write ordering, and queue limits.
Polling and shutdown integration `modules/piezo-processor/main.py`, `modules/piezo-processor/test_main.py`, `modules/common/biometrics/manifest.v1.json`, `src/demo/biometrics/worker-build.json`	Polling ticks both the vitals router and `BeatFront`. Shutdown clears the retry delay before the final flush attempt. Tests cover idle polling and shutdown. The manifest source hash and worker build hash changed.

Reference vitals test time

Layer / File(s)	Summary
Fixed time for reference vitals tests `src/demo/tests/biometrics.referenceVitals.test.ts`	File-level fake-timer hooks set the time to `NOW` and restore real timers. The overlapping-window sample test now uses these hooks.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Sequence Diagram(s)

sequenceDiagram
  participant Reader as Record reader
  participant BeatFront
  participant Database
  Reader->>BeatFront: Poll callback ticks retries
  BeatFront->>Database: Attempt queued heartbeat write
  Reader->>BeatFront: Shutdown flush
  BeatFront->>Database: Final bounded write attempt

Suggested reviewers: jasonlarue

Merge Risk: Minimal · up to 8e271

No outstanding issue identified in the heartbeat retry or fixed-time test changes; the PR is ready for normal merge checks.

Pre-merge checks: 3 · 1 · 1

Failed checks: 1 warning · 1 inconclusive

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 20 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.
Title check		The title "CR: fix/heartbeat-retry-1022" is a branch-style identifier, not a descriptive sentence. It names the heartbeat retry area, which matches the changeset, but it does not say what changed or w…	Rewrite the title as one short sentence that states the main change. For example: "Limit heartbeat retries to one failed transaction per drain with 5-second backoff." Remove the "CR:" prefix and the branch-style identifier, or move the tick…

Passed checks: 3 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Title check

Explanation

The title "CR: fix/heartbeat-retry-1022" is a branch-style identifier, not a descriptive sentence. It names the heartbeat retry area, which matches the changeset, but it does not say what changed or why. The "CR:" prefix and ticket-style suffix add noise. The title is too vague for a teammate scanning history to understand the primary change.

Resolution

Rewrite the title as one short sentence that states the main change. For example: "Limit heartbeat retries to one failed transaction per drain with 5-second backoff." Remove the "CR:" prefix and the branch-style identifier, or move the ticket reference into the description.

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ng · 2026-10-23T05:12:02Z

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ng · 2026-10-23T05:14:42Z

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Actionable comments posted: 2

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Inline comments:
Review comments at @modules/piezo-processor/main.py:
- Line 410: Update the retry flow around _drain and _write so pending records
are retried when the five-second deadline passes, even if no new piezo records
arrive. Invoke the retry drain from an existing periodic poll or timer as well
as from _write, preserving the current retry deadline behavior.
- Line 374: Update the shutdown flow in main() so the final beat_front.flush()
can drain or persist queued minutes within a bounded period before the database
connection closes, without letting _retry_after block that shutdown attempt.
Keep the existing retry backoff during ingestion.

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modules/common/biometrics/manifest.v1.json
modules/piezo-processor/main.py
modules/piezo-processor/test_main.py

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ng · 2026-10-23T05:21:26Z

Verified both lifecycle findings. The existing reader-thread poll now ticks the heartbeat queue without new records. Shutdown explicitly bypasses the deadline once, while still stopping after one failure. Regression tests cover recovered/locked shutdown, idle deadlines, and main-loop wiring. All 290 piezo tests and 22 registry tests pass. @coderabbitai review

coderabbitai · 2026-10-23T05:21:48Z

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ng · 2026-10-23T05:30:04Z

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ng · 2026-10-23T05:30:57Z

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# Conflicts: # src/demo/biometrics/worker-build.json

ng · 2026-10-24T23:05:27Z

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ng · 2026-10-24T23:26:42Z

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ng · 2026-10-25T01:04:04Z

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Heartbeat database outages now stop at the first failed queued transaction and wait five seconds after its completion before retrying. Chunks drain in order after recovery; the existing bounded queue policy is preserved, and reconnect accounting advances only for actual attempts. Idle reader polls retry without new piezo records, and shutdown gets one bounded final drain. The runtime manifest and browser-worker fingerprint are regenerated. Reference-sample tests use a fixed clock so a short live demo night cannot fail unrelated CI at bedtime. Validation: - 290 piezo tests passed using locked dependencies, including locked-database/I/O outages, backoff, reconnect cadence, ordering, idle retries, shutdown, and overflow. Runtime main.py coverage: 84% including branches. - 3 worker contract and 8 reference-sample tests passed. Fingerprint generated with isolated dependencies matches CI output. - Full pre-push TypeScript, ESLint, and both Drizzle checks passed. - No physical pod outage was induced. Mirror review: ng#33. Final CI and incremental review are running.   <details open> <summary>🛏️ <strong>Beam this PR onto a sleepypod</strong> ✨</summary> Pick the snippet that matches your pod. **Already-installed pods can't use the curl bootstraps below** — sleepypod's egress firewall DROPs github.com, and the script that knows how to unblock WAN is the very file curl is trying to fetch. Use `sp-update` instead; it's on disk and opens WAN as its first step. 🔄 **Already on a sleepypod** (most common — review a PR on a running pod): ```bash sudo sp-update fix/heartbeat-retry-1022 ``` 🚀 **Fresh pod / first install** — bootstraps from GitHub, rebuilds every push: ```bash curl -fsSL https://raw.githubusercontent.com/sleepypod/core/fix/heartbeat-retry-1022/scripts/install \ | sudo bash -s -- --branch fix/heartbeat-retry-1022 ``` 🎯 **Pin to this exact build** ([run 40142661083](https://github.com/sleepypod/core/actions/runs/40142661083) · `8e2714c`) — fresh-pod path, locked to one CI artifact for reproducible review: ```bash curl -fsSL https://raw.githubusercontent.com/sleepypod/core/8e2714c0f486938dab4efb67fc2c154027e7cac5/scripts/install \ | sudo bash -s -- \ --branch fix/heartbeat-retry-1022 \ --artifact-url 'https://nightly.link/sleepypod/core/actions/runs/40142661083/sleepypod-core.zip' ``` 🧊 Artifact: [`sleepypod-core`](https://github.com/sleepypod/core/actions/runs/40142661083/artifacts/12578903535) · self-destructs in 30 days 💥 </details>    ## Summary by CodeRabbit * **Bug Fixes** * Heartbeat data is retried after temporary write failures, including during idle polling, with a delay between attempts. * Queued heartbeat data is kept in order, with the oldest entries dropped if the retry queue exceeds its limit. * Pending heartbeat data receives a final write attempt during shutdown. * When leaving single-sleeper mode, held minutes are written before per-side data chunks.

fix(piezo): bound heartbeat retries with ordered backoff

c5927ce

fix(piezo): refresh heartbeat runtime source identity

7184d19

coderabbitai Bot reviewed Oct 23, 2026

View reviewed changes

Comment thread modules/piezo-processor/main.py Resolved

Comment thread modules/piezo-processor/main.py Resolved

fix(piezo): retry idle beats and drain once on shutdown

d0f6a17

chore(demo): refresh worker fingerprint for heartbeat manifest

0696604

ng mentioned this pull request Oct 23, 2026

fix(piezo): bound heartbeat retries with ordered backoff sleepypod/core#865

Merged

Merge remote-tracking branch 'origin/dev' into fix/heartbeat-retry-1022

b07e71b

# Conflicts: # src/demo/biometrics/worker-build.json

fix(demo): regenerate worker fingerprint with isolated dependencies

3e34af9

ng added 2 commits October 24, 2026 16:22

Merge remote-tracking branch 'origin/dev' into fix/heartbeat-retry-1022

98a234b

test(demo): freeze reference sample fixtures across every case

8e2714c

ng closed this Oct 25, 2026

ng deleted the fix/heartbeat-retry-1022 branch October 25, 2026 01:14

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