Cloud: stop redialing a refused family, and skip carrier preparation while signed out - #14059
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…head start #13299 redialed every address on a shared 50 ms tick. A family that had already refused was dialed again while the other family was still waiting for its head start, and the tick started that fallback 200 ms early. Each address now keeps its own redial timer from its first attempt, and a refused address is redialed only once no other address is still pending. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…count 999693e (#13202) started carrier preparation whenever Cloud activation allowed background work, before the fleet read. For a signed-out Mac that enrolls, or starts a hub from a config a previous account left on disk, which #13085's regression test forbids. Activation now prepares early only with a Cloud session; discovery still prepares after an authenticated read. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
#13299 redials an address that has not answered after 50 ms. This test advances its manual clock 250 ms in one step, so when the IPv4 refusal is not read before the jump, the first connection redials IPv4 once. Address reuse is still enforced: dialing IPv4 for every connection makes three. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe hedged connector now schedules redials per address and tracks indexed attempt outcomes. The surface provider registry prepares the WireGuard hub only when a cloud session is authenticated. Tests and the known-failures list were also updated. ChangesHedged connection redial
Cloud session gating
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🟡 Moderate · up to A Cloud connection may fail when one address is blackholed, and hub preparation can briefly use a previous account’s configuration after sign-out. Resolve these risks before merging. Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (2 errors, 1 warning)
✅ Passed checks (22 passed)
Full details: Cmux Swift Blocking RuntimeExplanation The production diff materially expands timing-based synchronization in Resolution Replace the per-candidate Full details: Cmux Swift Package BoundariesExplanation The changed Resolution Create a small SwiftPM target, such as ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Status: reviewing for merge. All three tests fail with their suite alone on main at 72490a9 (run 35933811445), so these are product bugs, not test pollution. At 26de5ee the route-selection, registry-polling, hedge and loopback suites passed; only the IPv4 dial count failed, and 0bd8514 loosens that count. Waiting on the focused run at 0bd8514 (35939793537, queued for a macOS runner) and 3 pending checks. Note that #13981 rewrites the same redial code and will conflict with this; it does not fix these failures. — Ibex g1 🌿 |
…e catalog Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Pushed 41bf832. It merges current main (19144b6), which brings the known-failure catalog from #14074, and removes this PR's three tests from that catalog: Checked locally: — Ibex g1 🌿 |
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A family that refuses once is never redialed while the other family is blackholed. At 41bf832, The connector's header names this case: a family can blackhole independently of the other after a VM joins its VPC. On main, #13299's redial rounds still dial the refused family every 50 ms, so this is a regression for that case. Proposed fix, with a red test first. It is on branch
func anotherCandidateIsPending(besides index: Int) -> Bool {
(0..<candidates).contains { other in
guard other != index else { return false }
guard started[other] else { return true }
// Redial ticks measure how long the other family has gone
// unanswered; past its head start it may be blackholed.
return inFlight[other] > 0 && !failed[other] && redialInterval * redials[other] < fallbackDelay
}
}Verified in a standalone swiftc 6.3 harness. It runs
Not verified: the app-host suites.
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Inline comments:
In `@cmuxTests/CloudHubConnectorHedgeTests.swift`:
- Line 90: Replace the measured ContinuousClock duration check around
fallbackStart in the hedge test with an injected SidebarTestManualClock. Wait
until the task is sleeping for 200 ms, verify candidate 1 has not been recorded
while the clock is parked, advance the virtual clock by 200 ms, then verify
candidate 1 wins.
In `@Sources/Cloud/PortForward/CloudHubConnector.swift`:
- Around line 115-117: Update anotherCandidateIsPending to count in-flight
candidates as pending only within a bounded window since their last answer;
track unanswered redial ticks and reset them when a candidate fails. In the
redial handler, increment the redial budget only when launching an attempt, so
skipped ticks do not exhaust it. Add a test where candidate 1 hangs and
candidate 0 refuses until it can succeed, verifying candidate 0 wins before the
timeout.
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Inline comments:
In `@Sources/Surfaces/CmuxTuiSurfaceProviderRegistry.swift`:
- Around line 305-311: Track the `prepareForCloudUse()` activation task instead
of launching it untracked, and cancel it when `invalidateAccess()` runs. In
`accessDidEnd()`, stop `wireGuardHub` immediately after invalidation and before
deferred provider or link teardown begins.
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Needs changes: a refused family is never redialed while the other family is blackholed. This regresses a case that main handles.
At 26de41f, anotherCandidateIsPending(besides:) counts any candidate with an attempt in flight as pending. A blackholed family keeps an attempt in flight until the 15 s deadline. Take a new machine whose IPv4 listener refuses the first dial while IPv6 never answers:
- On every
.redialtick,failed[0] && anotherCandidateIsPending(besides: 0)is true, so IPv4 is skipped. redials[0] += 1still runs on each skipped tick, so the budget runs out after 60 ticks (3 s) and IPv4 stops being scheduled.- The connect fails at the deadline even after the IPv4 listener opens.
On main, #13299's shared tick redials every family every 50 ms, so that case recovers. The connector's own header names a family that blackholes independently of the other after a VM joins its VPC, so this is a real path, not a corner case. The PR's rule is right that a refusal is an answer while the other family is still answering. It is wrong once the other family has gone silent past its head start.
austinywang posted a fix with a red test first on axiom/14059-blackholed-family-redial: 22980a8 adds refusedFamilyIsRedialedWhileTheOtherIsBlackholed, and 396c454 stops counting a candidate as pending once it has gone fallbackDelay without answering. His harness numbers: the new test goes from 0/5 to 5/5, and "IPv4 opens at 400 ms, IPv6 silent" goes from failing at 15.7 s to connecting at 0.52 s. Taking those two commits, or an equivalent, resolves the CodeRabbit thread at CloudHubConnector.swift:117 too. The branch is 298 commits behind main, so cherry-pick rather than merge. He flagged one cost: partialAddressesPreserveFallback runs on the real clock and would count a second IPv4 dial if the fake hub's IPv6 handshake took over about 260 ms. The rerun after the fix needs to include that suite.
Other open threads, neither blocking:
CloudHubConnectorHedgeTests.swift:90, the wall-clock check.fallbackStart - began >= 180 msis a lower bound on a real 200 ms sleep, which cannot return early, so it does not flake, andquality-determinismpassed. A manual clock would still be cleaner. Resolve the thread either way.CmuxTuiSurfaceProviderRegistry.swift:311, the sign-out fence. The race it describes, where a preparation already started outlives sign-out, exists on main too. This PR narrows it by gating activation onhasCloudSession. Take it as a follow-up issue, not in this PR.
The signed-out carrier fix (hasCloudSession) and the known-failure catalog shrink look correct.
Evidence: focused run 35963866017 at 77d56b3 built and ran the four Cloud suites green, and nothing in the PR's code has changed since. It does not cover the blackholed case, because no test exercises it. Required checks at 26de41f: CLA Assistant, CLA policy guard, Web complexity and web-validation pass. ci-status has not reported yet, because macOS compile admission is still pending.
Independent review (reviewer subagent, not the author session).
#14059 skips redialing a refused candidate while another candidate has an attempt in flight. A blackholed family keeps an attempt in flight until the deadline, so a family that refused once, because its listener was not open yet, is never tried again. The connect then fails at the deadline even though that family came up. The connector's own documentation names the case: a family can blackhole independently of the other after a VM joins its VPC. On the current connector this test throws the refusal at the 2 s timeout, having dialed the refused family once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A refused candidate now waits only while another candidate is untried, or has an attempt in flight that is younger than `fallbackDelay` and has not failed. Redial ticks measure that age, so the rule needs no clock reads. After the head start the silent family may be blackholed, and the refused family is dialed again, which is how the connector behaved before #14059 for that case. The burst behavior #14059 fixed is kept: while the other family answers within its head start, as a working family does, the refused family is not redialed. With the defaults (250 ms head start, 50 ms redials) a refused family is redialed only after its peer has gone five redial ticks without answering. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A refused family's redial tick that is skipped, because the other family is still pending, still counts against maxRedials. With a small cap the refused family spends every redial while it waits and is never dialed again, even once its listener opens. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A redial tick skipped because the other family is pending no longer counts against maxRedials; a separate tick count still measures how long the other family has gone unanswered. A refused family keeps its full redial budget for after the other family outlives its head start. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@austinywang thanks, this was a real regression. Your two commits are on the branch as cherry-picks: ec24027 ( Evidence at a8949f7: the changed-suite run (35972383709) ran all 7 Not covered by CI here: Merging. |
3f92ff6 ci: let main's full-suite compile admission adopt the DerivedData seed (manaflow-ai#14158) f9b1a13 iOS: Settings > Reset erases all local data (manaflow-ai#14140) 5c0ecdd ci: adopt the seed nearest the commit a PR merges onto (manaflow-ai#14190) 1858911 Cloud: stop redialing a refused family, and skip carrier preparation while signed out (manaflow-ai#14059) db22f66 ci: give every macOS job its pool's pinned Xcode, and refuse one below .xcode-version (manaflow-ai#14050) 2217683 Fix Cloud sidebar hover buttons (delete toggled the row) (manaflow-ai#13982) 5c08894 Resolve CLI workspace refs without requiring --window (manaflow-ai#13964) 5709fad fix(cli): keep omc pane IDs in default JSON listings (manaflow-ai#10674) 1557471 Setup no longer fails when a clone already has Git hooks (manaflow-ai#14200) # Conflicts: # .github/workflows/ci-guards.yml # .github/workflows/ci-macos.yml # .github/workflows/ci.yml # .github/workflows/cli-pipe-regressions.yml # .github/workflows/cloud-command-deadlines.yml # .github/workflows/cloud-task-local-tests.yml # .github/workflows/ios-screenshots.yml # .github/workflows/ios-testflight.yml # .github/workflows/iroh-v2.yml # .github/workflows/plain-paste-worker.yml # .github/workflows/release.yml # .github/workflows/seed-derived-data.yml # .github/workflows/terminal-hang-diagnostics.yml # .github/workflows/test-ios.yml
2 participants
Summary
Three Cloud tests fail on main in every app-host run today, and each also fails when its suite runs alone at main (run 35933811445, 72490a9). So these are real bugs, not cross-test contamination.
Refused family redialed; fallback started early. "Partial attach addresses retain the other discovered family" and "Successive browser connections reuse the working family and recover if it fails" broke with the hub connector's redial hedging from #13299 (638aaa7). One shared 50 ms tick relaunched every address. That had two effects:
Each address now has its own redial timer, which starts with its first attempt. An address that failed outright is redialed only when no other address is still waiting or in flight. When every address has refused (a new machine whose listener is not open yet), all of them are still redialed until the cap or the deadline. This is a product fix.
Carrier prepared while signed out. "A closed Cloud gate or an unauthenticated fleet read cannot prepare a tunnel" (enabled = true) has failed since 999693e (#13202). That commit made activation prepare the WireGuard carrier before the fleet read, whether or not an account was signed in. A signed-out Mac therefore enrolls, or starts a hub from a config that a previous account left on disk. Activation now prepares early only when
hasCloudSessionis true (production readsaccountFlow.isAuthenticated). After an authenticated fleet read, discovery still prepares the carrier. This is a product fix; the test only gains the newhasCloudSession: { false }argument.One stale test expectation. "Successive browser connections…" advances its manual clock 250 ms in one step, which also passes the 50 ms redial point. If the IPv4 refusal has not been read by then, the first connection legitimately redials IPv4 once. The assertion is now "at most 2 IPv4 dials across 3 connections". Dialing IPv4 for every connection gives at least 3, so reuse is still enforced.
Testing
Red:
CloudHubConnectorHedgeTestsat test commit 732a7fe fails the new refused-family test: IPv4 was dialed 2 times and the fallback started at 0.02 s (35933992268).Fix commit 26de5ee (35933988947): these suites each passed alone:
Only the address-reuse IPv4 count failed, which led to the test commit above.
Head 0bd8514: 35939793537, which was still queued for a macOS runner when this was written.
The
hedgedlogic was also compiled and run on Linux (Swift 6.1, Swift 6 mode) against the existing and new hedge scenarios.Not verified: the full app-host shard layout, and a live dual-stack Cloud machine.
This conflicts textually with open #13981, which rewrites the same
hedgedloop's redial schedule. #13981 does not fix these failures, because it still redials every address on a shared tick.Checklist
— Ibex g1 🌿 (subagent)
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