fix(events): sync endpoints dropped their WS events — rename/delete left every tab stale - #1562
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paoloantinori wants to merge 12 commits into
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fix(events): sync endpoints dropped their WS events — rename/delete left every tab stale#1562paoloantinori wants to merge 12 commits into
paoloantinori wants to merge 12 commits into
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TASK-1: stuck model loads (>1200s), unkillable abandoned workers holding device TASK-2: exploration of durable fixes (flush caches, CPU engine, timeout, shorter text)
# Conflicts: # .gitignore
…eft every open tab stale
PUT/DELETE /profiles (rename, delete, revoke consent) and the history/export
mutators are sync FastAPI endpoints: their bodies run in threadpool workers
where asyncio.get_running_loop() raises, so event_bus.emit() hit the
RuntimeError branch and silently dropped the "profiles" event. The UI only
refetches the voice list on that event, so after a rename the list kept stale
state, and a reload during that window could land on an empty panel (no
retry on the initial load either) — which reads to a user as "all my voices
are gone" even though nothing was deleted.
emit() now captures the serving loop in subscribe() and hands off from
foreign threads via call_soon_threadsafe (async callers are unchanged).
Also: the initial list loads in useAppData retry until FIRST success via
retryInitialLoad — a WS-triggered reload failure still keeps the previous
list, but the first load has nothing to keep. Loaders gained {rethrow: true}
for the initial path so the retry actually engages (they swallow errors by
design elsewhere); an integration test pins that wiring.
Tests: tests/test_event_bus_thread_emit.py fails on the old emit (verified
by stashing the fix) and passes with it; a live two-instance probe confirmed
PUT rename → WS event arrives on the fixed build and never on the original.
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| Filename | Overview |
|---|---|
| backend/core/event_bus.py | Routes event emissions from worker threads onto the captured WebSocket-serving event loop. |
| frontend/src/hooks/useAppData.js | Adds retrying initial list loads while retaining failure-tolerant WebSocket refresh behavior. |
| frontend/src/utils/initialLoadRetry.js | Implements cancellable exponential-backoff retries until the first successful load. |
| tests/test_event_bus_thread_emit.py | Verifies that a loop-less worker thread can deliver an event to a listener on the serving loop. |
| frontend/src/test/initialLoadRetry.test.js | Covers retry success, cancellation, and initial-loader error propagation wiring. |
| CHANGELOG.md | The entry now satisfies the previously requested Highlights placement, issue reference, and community-credit format. |
Reviews (6): Last reviewed commit: "style(frontend): oxfmt useAppData (CI fo..." | Re-trigger Greptile
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📝 WalkthroughWalkthroughThe backend routes worker-thread WebSocket events through the serving event loop. The frontend retries initial dataset loads until success and cancels retries during cleanup. ChangesState synchronization and initial loading
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: ⚪ Minimal · up to The change restores WebSocket updates from synchronous endpoints and retries initial data loads without changing the established reload behavior; no actionable merge-blocking risk remains beyond normal checks and review. 🚥 Pre-merge checks | ✅ 8 | ❌ 1❌ Failed checks (1 warning)
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Actionable comments posted: 3
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Inline comments:
In `@CHANGELOG.md`:
- Line 37: Update the changelog entry to remain a single line and append the
required issue or pull-request reference in the form (`#NNN`), using the correct
reference for this change.
In `@frontend/src/hooks/useAppData.js`:
- Around line 175-179: Update the initial-loading flow in useAppData and the
related list loaders to track a request generation per list, and apply results
only when the completing request matches the latest generation; older initial
responses must be ignored when they finish after WebSocket-triggered reloads.
Preserve current loading behavior and add a regression test that completes the
overlapping requests in reverse order and verifies stale data does not replace
the newer list.
In `@tests/test_event_bus_thread_emit.py`:
- Around line 72-79: Replace the deadline loop and asyncio.sleep polling around
q with a single asyncio.wait_for(q.get(), timeout=2.0) await, append the
returned item to received, and preserve the test’s existing timeout/failure
behavior.
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- Create a new PR with the fixes
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CHANGELOG.mdbackend/core/event_bus.pyfrontend/src/hooks/useAppData.jsfrontend/src/test/initialLoadRetry.test.jsfrontend/src/utils/initialLoadRetry.jstests/test_event_bus_thread_emit.py
CodeRabbit debpalash#1562 findings, both real: - makeLoader is now generation-guarded: the initial retry loop overlaps freely with WS-triggered reloads, and a slow in-flight response could resolve AFTER a fresher reload and overwrite its list with stale data. Each invocation bumps a generation; only the newest may setState. - The regression test awaited the queue via sleep-polling; it now uses asyncio.wait_for(q.get()) so a failure surfaces as TimeoutError instead of depending on 10ms poll timing (repo rule: no sleeps as sync).
…dpool-emit # Conflicts: # CHANGELOG.md # frontend/src/hooks/useAppData.js
…ation state in a ref instead
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Fixes #1561.
What
emit()called from a threadpool worker (sync FastAPI endpoint: profile rename/delete/revoke-consent, history star/clear/delete, export recorders) used to hit theRuntimeErrorbranch ofasyncio.get_running_loop()and silently drop the event.subscribe()now captures the serving loop and foreign threads hand off viacall_soon_threadsafe; async callers take the samecreate_taskpath as before.{ rethrow: true }for the initial path so the retry actually engages — they swallow errors by design everywhere else, and without this the retry resolves on attempt one (caught during self-review).Why
The UI refetches the voice list only on the WS
profilesevent, so a rename left every open tab stale; a reload in that window with a transient first-fetch failure presented an empty voices panel — indistinguishable from data loss to a user, though nothing was deleted (#1561 has the full repro and the live-socket evidence).Verification
tests/test_event_bus_thread_emit.py: fails on the original emit (re-verified by stashing the fix), passes with it. Drives the real shape: serving loop in its own thread,emit()from a loop-less worker.OMNIVOICE_DATA_DIR, throwaway ports): PUT rename →{"kind":"profiles","action":"updated"}arrives on the WS with the fix; nothing arrives within 3s on the original build.frontendvitest suite (4 tests incl. a wiring pin that fails if{ rethrow: true }ever disappears from the call site) andbun run buildboth green.tests/test_api.py: 4 failures that pre-date this branch (non-loopback 401-vs-403 class; identical with/without this diff).Notes for reviewers
subscribe()vs lifespan vs per-endpoint asyncification) was reviewed andsubscribe()chosen: it is the first point the serving loop provably exists, and converting endpoints to async would move their DB I/O onto the event loop for no gain.The event bus now forwards WebSocket events from synchronous threadpool endpoints, and initial frontend list loads retry with exponential backoff. This prevents stale cross-tab data and empty lists after transient failures while preserving existing WebSocket reload behavior. Review event-loop lifecycle handling and retry cancellation paths; four
tests/test_api.pyfailures are pre-existing.