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fix(cli): treat cancelled context as terminal in engine-version fan-out - #2139
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queryMajorEngineVersionsWithClient downgraded every per-engine error to a warning, so a cancelled context or expired deadline produced a partial version map with a nil error and callers treated it as a complete query. The loop now checks ctx.Err() before each engine and after each failed fetch, returning nil plus the context error instead of continuing. The caller's context is checked rather than the wrapped API error so SDK-internal timeouts (e.g. credential-fetch deadlines) still degrade to the pre-existing per-engine warning. Closes #1325
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Included review availability: This review used your included allowance. 0 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 1 review per hour. 📝 WalkthroughWalkthroughThe engine-version query now returns caller-context cancellation and deadline errors instead of continuing to query engines. Tests cover cancellation during a query, an expired deadline, and a context canceled before the call. ChangesEngine Version Query Cancellation
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to The engine-version query now returns caller cancellation or deadline errors instead of continuing the fan-out or returning partial data. Tests cover the main cancellation paths. No merge-blocking risk is evident. 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @cmd/multi_service_engine_versions.go:
- Around line 218-232: Update queryMajorEngineVersionsWithClient to check
ctx.Err() after the engine-fetch loop and return the context error before
returning versionInfo, including when the final fetch succeeds.
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cmd/multi_service_engine_versions.gocmd/multi_service_engine_versions_paginate_test.go
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Return the caller context error and discard lifecycle data when the last successful RDS response arrives after cancellation. Pin the four-engine success case with a regression that fails on the previous source.
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Reviewed head: Independent Codex reviewer completed two full-PR passes on this exact head: no actionable findings. The CodeRabbit final-success cancellation finding is fixed in Regression evidence: original pre-fix source returned a partial lifecycle map and nil error after caller cancellation/deadline expiry. The final-success regression also failed on Fresh build passed. Independent binary metadata verified Darwin/arm64, Go 1.26.6, this exact revision, Local full-suite limitation: two uncached no-skip race suites were attempted. The integrated-head run, including documented GOGC=10 and GOFLAGS=-p=1 containment, failed after 1202.451s in the pre-existing Fresh exact-head CI: build/test run 37710817347 and pre-commit run 37710817480 completed SUCCESS. All nine workflow checks are successful; gosec/Trivy reporting statuses are neutral. CI will be re-fetched with unchanged head and clean mergeability immediately before normal merge. CR waived: quota, adversarial review + local verification + green CI. The final full-review request received explicit rate limiting: #2139 (comment). This waiver does not erase the prior finding, which is fixed and independently verified. Retrospective CodeRabbit review remains tracked for the existing coordinator cadence, without a duplicate timer. Evidence is fixture-based; no live AWS account or purchase was used. CLI-wide SIGINT propagation is not claimed: existing callers construct Background contexts and downgrade query errors. That separate orchestration gap is now tracked in #2151. Exact-model and live-account gates are superseded by the owner's explicit instruction. Normal protections, independent review, actionable resolution, adequate affected-path verification, exact-head green CI and unchanged clean mergeability remain required. Follow-up issues: #2151 filed; existing #2150 and #2148 reused. All branches, files, tests, history and processes preserved; no reset, deletion, force push, purchase or protection bypass. |
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Post-merge verification: e30a57e has the same tree 40145ac7a39012feafe45d152bef5a70220f6d08 as reviewed head 7a4ba46. Main CI run 37717789063 and pre-commit run 37717789167 both completed SUCCESS. A fresh post-merge focused race run passed in 41.129s. Fixture seams: public queryMajorEngineVersions covers configuration loading, actual SDK HTTP, populated-page cancellation and deadline; final-body cancellation uses an actual SDK client with a fixture HTTPClient through queryMajorEngineVersionsWithClient. No live AWS or CLI-wide SIGINT coverage is claimed. Retrospective CR quota debt is delegated to the existing coordinator cadence, with no new timer. |
1 participant
Why
queryMajorEngineVersionsWithClientdowngraded every per-engine error to awarning, so a cancelled context or expired deadline produced a partial
version map with a
nilerror. Callers then treated incompleteextended-support data as a complete query — the exact silent-partial-result
class flagged before on this codebase (PR #1225 surfaced this instance).
What
ctx.Err()before each engine and after eachfailed fetch; a cancelled caller context returns
nilplus the contexterror instead of continuing the fan-out.
ctx.Err(), noterrors.Ison the APIerror: the AWS SDK wraps its own internal timeouts (credential-fetch
deadlines) as
context.DeadlineExceeded, and those must still degrade tothe pre-existing per-engine warning.
Tests
New cases in
cmd/multi_service_engine_versions_paginate_test.go:context.Canceledmid-fan-out stops after the first engine%w)context.Canceledbehaves the sameFull
cmdpackage suite green locally (ok ... 459s),gofmt/go vet/pre-commit hooks clean. Test evidence is mock-based; the fan-out loop has no
real-AWS path to exercise locally.
Closes #1325
Summary by CodeRabbit