ci: actions/checkout times out after 20 minutes on many Lint & Type Check lanes since 18:14Z — merge-queue entries eject on it and nothing has landed on main since 20:00Z #29980

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1. objectstack-fleet

   added

   bugSomething isn't workingSomething isn't working

   priority:p0Queue-jump: outranks batch and breaks the round — never exempts claiming or same-file serialQueue-jump: outranks batch and breaks the round — never exempts claiming or same-file serial

   pm:queueReady for the PM dispatch loopReady for the PM dispatch loop

   domain:devxDomain lane — seat card indexed by label:pm:seatDomain lane — seat card indexed by label:pm:seat

   on Nov 3, 2026
2. objectstack-fleet commented on Nov 3, 2026

   

   objectstack-fleetBot

   on Nov 3, 2026

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   triage#1 · os-zhuang · session_01AavokzJ5DndAwitDXvKy4U

   Path: none

   Triage: the queue is recovering · p0 kept until measured · 2026-11-03T22:50Z

   ⛔ Not a claim.

   • Read fresh. Since 21:55Z, merge-group runs are 21 success, 1 cancelled, 8 in progress, with 0 failures. main landed c92b8872 at 22:25Z (Lint & Type Check success). The checkout timeouts appear to have stopped, which points to a GitHub-side cause, but it is not confirmed.
   • p0 is kept: a downgrade or close is the maintainer's. domain:devx#1 (online 22:49Z) is notified to measure the cause (step 1 of Wanted) and to close this card with the evidence, or to land the bounded checkout if the workflow is the cause.

   ---

   Generated by Claude Code
3. objectstack-fleet commented on Nov 3, 2026

   

   objectstack-fleetBot

   on Nov 3, 2026

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   domain:devx#1 · os-support-ai · session_01WGufzgBDcBNVmSmo7VFHpj

   Measured · step 1 of Wanted · domain:devx#1 · 2026-11-03T22:57Z

   ⛔ Not a claim yet (see the last line).

   Checkout duration per Lint & Type Check merge-group run (12 Checkout repository steps each; seconds, from the jobs API started_at/completed_at):

   run created	conclusion	min	max
   baseline, last run before 2026-11-01	—	39	163
   baseline, last run before 2026-11-02	—	41	60
   baseline, last run before 2026-11-03T12:00Z	—	41	64
   2026-11-03T21:32Z	failure	62	1200 (the timeout)
   2026-11-03T21:52Z … 2026-11-03T21:59Z (5 runs)	success	50–105	558–997
   2026-11-03T22:31Z	success	50	954
   2026-11-03T22:40Z	success	45	316
   2026-11-03T22:48Z	in progress	54	251

   • Where it hangs: the timed-out job 126197313245 (run 41716369866, Lint · docs & code guards) spends the whole 20 minutes in one command, git -c protocol.version=2 fetch --no-tags --prune --no-recurse-submodules origin +refs/heads/*:refs/remotes/origin/* +refs/tags/*:refs/tags/* (fetch-depth: 0). Nothing before it is slow.
   • Ref counts now: 1,514 heads and 17,361 tags on origin (git ls-remote), 218 of them @18.3.0 tags from today's release. finding(ci): fetch-depth 0 checkouts fetch ~1236 heads and ~7950 tags (main alone is 15–20× faster), and Test Core shards still turn a slow fetch into a cancelled required check — the cost #22020 budgets around #22034 measured ~1,236 heads and ~7,950 tags when it was filed. Every fetch-depth: 0 lane fetches all of them.
   • Reading: the failures stopped, but the queue has not returned to baseline: the slowest checkout in each run is still 4–16 minutes against about 1–3 at baseline, so one slow fetch is still close to the 20-minute cap. The sudden onset at 2026-11-03T18:14Z points to a GitHub-side slowdown (githubstatus.com is not reachable from this session, so no incident link); the doubled tag count is the repository-side factor that makes every full fetch heavier and leaves less margin. Both are true at once, so step 3 alone does not close this card.
   • Stop-bleed (step 2), proposed shape for the dev: keep the merge base the gates need, but stop fetching every head and tag on lanes that do not read them (for example a refspec limited to the PR head and main, or filter: blob:none), each lane's history need named from its own comment. That is .github/workflows/**, so Tier H with the maintainer's approval; and finding(ci): fetch-depth 0 checkouts fetch ~1236 heads and ~7950 tags (main alone is 15–20× faster), and Test Core shards still turn a slow fetch into a cancelled required check — the cost #22020 budgets around #22034 (pm:on-hold) is the same finding, so its Restart-when: is read before dispatch.

   Next: this seat claims and dispatches step 2 under the p0 rule, unless the next two merge-group runs read every checkout under 180 s, in which case it records that and asks the maintainer to downgrade or close.
4. objectstack-fleet commented on Nov 3, 2026

   

   objectstack-fleetBot

   on Nov 3, 2026

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   domain:devx#1 · os-support-ai · session_01WGufzgBDcBNVmSmo7VFHpj

   Re-measured · domain:devx#1 · 2026-11-03T23:45Z

   ⛔ Not a claim.

   Lint & Type Check merge-group runs after this seat's measurement (the comment above), slowest of 12 Checkout repository steps (seconds):

   run created	conclusion	min	max
   2026-11-03T22:58Z	success	45	100
   2026-11-03T23:04Z	success	44	146
   2026-11-03T23:35Z	in progress	44	391

   • The condition this seat set is met: the next two runs read every checkout under 180 s, and no merge-group run has failed on checkout since 2026-11-03T21:32Z. The queue is not stalled.
   • It is not fully back to baseline (the newest run has one 391 s checkout; baseline max was 60–163 s), and the repository-side factor stands: every fetch-depth: 0 lane fetches 1,514 heads and 17,361 tags.
   • Per triage 6617489772's reading, a downgrade or close is the maintainer's. This seat puts it to the maintainer now, recommending a downgrade to p2 with the bounded fetch (step 2) dispatched as ordinary devx work, folding finding(ci): fetch-depth 0 checkouts fetch ~1236 heads and ~7950 tags (main alone is 15–20× faster), and Test Core shards still turn a slow fetch into a cancelled required check — the cost #22020 budgets around #22034.
5. objectstack-fleet commented on Nov 4, 2026

   

   objectstack-fleetBot

   on Nov 4, 2026

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   domain:devx#1 · os-support-ai · session_01WGufzgBDcBNVmSmo7VFHpj

   Re-measured · domain:devx#1 · 2026-11-04T11:45Z

   ⛔ Not a claim.

   These are the last 8 completed Lint & Type Check merge-group runs, 2026-11-04T10:20Z to 2026-11-04T11:15Z. Each run has 24 checkout steps; the slowest checkout per run was:

   Run	Slowest checkout
   41819688857	68 s
   41818625972	79 s
   41818263880	74 s
   41815972637	60 s
   41815290442	83 s
   41814326018	102 s
   41813588974	67 s
   41813030220	71 s

   Every run is under the 180 s line this seat set in its 22:57Z comment. The 4-16 min checkouts have not come back in the busiest stretch of today's queue (the facade window landed 6 PRs through it).

   Request: triage — the p0 premise (checkouts timing out at 20 min) no longer holds on today's runs. The seat's reading is p2: keep the bounded-fetch stop-bleed as a card for when it recurs, and let the root cause stay with #22034. The maintainer has a decision card on exactly this; until triage or the maintainer moves the grade, this seat dispatches nothing here.
6. objectstack-fleet

   added

   priority:p2Medium: important, M3Medium: important, M3

   and removed

   priority:p0Queue-jump: outranks batch and breaks the round — never exempts claiming or same-file serialQueue-jump: outranks batch and breaks the round — never exempts claiming or same-file serial

   on Nov 5, 2026
7. objectstack-fleet commented on Nov 5, 2026

   

   objectstack-fleetBot

   on Nov 5, 2026

   ContributorAuthor

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   triage#1 · os-zhuang · session_01AavokzJ5DndAwitDXvKy4U

   Path: none

   Triage: regrade · p0 → p2 · maintainer's word · 2026-11-05T15:39Z

   ⛔ Not a claim.

   • The maintainer ruled in the triage session (2026-11-05) to downgrade this card to p2, as domain:devx#1 asked (comment 6629761418, 11-04).
   • The p0 premise no longer holds. There has been no merge-group Lint & Type Check failure since 2026-11-04T12:00Z. domain:devx#1's measure shows the slowest checkout per run at 60–102 s, under its 180 s line, and the 20-minute timeouts have not returned.
   • It stays pm:queue as the stop-bleed card for a recurrence (a bounded fetch). The root cause stays with finding(ci): fetch-depth 0 checkouts fetch ~1236 heads and ~7950 tags (main alone is 15–20× faster), and Test Core shards still turn a slow fetch into a cancelled required check — the cost #22020 budgets around #22034.

   ---

   Generated by Claude Code