DecisionsApp load(): stale response must not overwrite a newer one (last-write-wins race) - #2466
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…vent stale overwrites - Add latestSeq ref that increments on each load() entry - Guard setPending, setAnswered, setAuthRequests, and setLoading(false) with seq === latestSeq.current so only the last-started load wins - Add test that holds the first load's fetches pending, lets a second load land with newer data, then releases the first load with older data and asserts the stale response did not overwrite
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📝 WalkthroughWalkthrough
ChangesDecisions load race handling
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to An older load can still overwrite newer Decisions data if its response parsing finishes after a subsequent load starts, leaving users with stale results. The PR is not merge-ready until the state updates are guarded after parsing and the race is covered by a regression test. Possibly related PRs
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Code Review SummaryStatus: No Issues Found | Recommendation: Merge Files Reviewed (3 files)
Reviewed by step-3.7-flash · Input: 66.6K · Output: 4.6K · Cached: 176K |
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Actionable comments posted: 1
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Inline comments:
In `@desktop/src/apps/DecisionsApp.tsx`:
- Around line 605-612: Update the response handling around the pending,
answered, and auth-request setters so each successful response is parsed first,
then rechecks seq against latestSeq.current immediately before calling
setPending, setAnswered, or setAuthRequests. Extend the relevant regression test
to delay an older response’s json() resolution and verify that stale data is not
written after a newer load begins.
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Fix all unresolved CodeRabbit comments on this PR:
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📒 Files selected for processing (3)
changelog.d/tsk-ycfglg-decisions-load-race.mddesktop/src/apps/DecisionsApp.test.tsxdesktop/src/apps/DecisionsApp.tsx
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nemotron-super review VERDICT: No blocking issues found Automated first-pass review by the nemotron-super lane. The lead still reviews before merge. |
The seq guard ran before each awaited json() parse, so a newer load starting mid-parse still let the stale body land (CR finding). Parse first, re-check seq immediately before each setter. The seq-guarded finally left loading stuck true forever when a silent focus refresh outraced the mount load (only non-silent caller), which also made both race regression tests vacuous: they asserted against the Loading placeholder, not the rendered list. finally now always clears its own non-silent loading; both tests assert the placeholder is gone before asserting stale data is absent. Red (pre-fix): 2 failed (both race tests). Green: 14 passed.
# Conflicts: # desktop/src/apps/DecisionsApp.test.tsx
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Reviewed + fixed forward (0157a6b + merge 5282e60). CodeRabbit's Major is CONFIRMED, and chasing it surfaced two more defects in the same function:
Measured: red on pre-fix code: Merge on green after any new bot output is read. |
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CARD TITLE (intent, not commit subject): DecisionsApp load(): stale response must not overwrite a newer one (last-write-wins race)
Autonomous build of board card tsk-ycfglg.
with seq === latestSeq.current so only the last-started load wins
load land with newer data, then releases the first load with older
data and asserts the stale response did not overwrite
Files:
changelog.d/tsk-ycfglg-decisions-load-race.md | 2 +
desktop/src/apps/DecisionsApp.test.tsx | 64 +++++++++++++++++++++++++++
desktop/src/apps/DecisionsApp.tsx | 12 +++--
3 files changed, 74 insertions(+), 4 deletions(-)
Summary by CodeRabbit
Bug Fixes
Tests