J386: tracer browser baseline is red on compute01 #434
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opened 2026-11-08 18:44:09 +00:00 by kayg
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J386: make the tracer browser suite green on compute01.
J367 ran the full tracer Playwright suite on compute01 (unmodified base): 997 passed, 147 skipped, 104 failed; failing files rerun on base: 92 failures. The same specs pass on dev-02. A red baseline means
verify faston compute01 cannot catch real UI regressions.Plan: classify failures by cause (host environment vs dev regression), compare compute01 and dev-02 (Chromium, fonts, playwright config, env, load), fix the root cause reproducibly from the repo, prove with a full run on both hosts. Branch
fix-compute01-browser-baseline, base origin/deva894dd877. Estimate: 4 h including full-suite runs.Start: branch
fix-compute01-browser-baseline, base origin/deva894dd877. First comparison: both hosts have identical Playwright 1.65.0 and chromium-1228/1254 trees. Differences: compute01 is Debian 13 x86_64, TZ Europe/Berlin (CET), LANG=en_US.UTF-8, 16 vCPU at load ~10-13 (parallel jobs); dev-02 is Ubuntu 24.04 aarch64, TZ UTC, LANG=C.UTF-8, load ~1.5. Fonts: same families except compute01 also has Liberation Sans Narrow. Next: run failing specs on compute01 to read the actual errors.Finding 1 (root cause, proven):
socket hang up (ECONNRESET)on/__mock/*POSTs (27 of the 92 base failures: font-metrics, font-weight, and the cascade in other specs).apps/tracer/test/mock-server.tsis a Nodehttpserver with the default 5 skeepAliveTimeout. A spec'scontext.requestholds one keep-alive socket and reuses it after a page load; on a busy host (compute01 load 10-13 on 16 vCPU, vs 1.5 on dev-02) the page load takes longer than 5 s, so the reuse races the server's close. Host-speed dependent, not a font problem.Evidence:
~claude/j386-evidence/run1.logon compute01 (unpatched, font-metrics + wheel-scroll): font-metrics 6 of 18 failed with ECONNRESET at 6.5 s each, different ones each run. Withserver.keepAliveTimeout = 0(run3.log): font-metrics 18/18 pass.Finding 2 (open): wheel-scroll / docs-palette fail deterministically with
.dr-page h1not found within 10 s after opening the Keys docs page. Page snapshot at failure shows the article rendered. Probing.Progress. Pushed to
fix-compute01-browser-baseline:355803060(keep-alive fix, finding 1) and20e9e5352(finding 2).Finding 2 (real dev regression, not the host): wheel-scroll.spec.ts waits for window
d-keys; D317 (7dd462e9e) moved the page toreference/keys, so the window isd-reference/keys. A probe on compute01 listed the Docs windows (~claude/j386-evidence/run4.log):d-reference/keyspresent,d-keysabsent, no failed requests. Fixed the selector. J367's "passes on dev-02" does not hold for this spec: dev-02's J367 logs never ran it.Now: running all 52 originally failing spec files on compute01 (patched) and on dev-02 (unpatched base, to see which failures are host-independent). Both are queued behind other jobs (compute01 position 9, dev-02 position 7). Logs:
~claude/j386-evidence/run-failing.logon each host.Finding 3 (reclassification): J367's "the same specs pass on dev-02" is wrong. I ran the 38 spec files that held the 104 base failures on dev-02 (aarch64, unpatched
a894dd877): 82 failed, 299 passed (~claude/j386-evidence/d02-failing.logon dev-02). So most of the red baseline is not compute01's environment:878a8a68b): font-metrics 7 + font-weight 8 fail on dev-02 too with the same ECONNRESET.3b15565dd), ca-unlock 7 (s-hostsvss-terminal-hostswindow id; toast stacking), startup-demo 6 (.ui-toast-messagestrict), addhost-pill-stream 8, docs-palette 4, glass-ghost 4, predictive-backspace 7 / predictive-echo 5, swipes 4, others. RTT and "no bar at rest" ones (core-screen, platform-consistency) are already fixed on dev by #430, which I rebased onto (origin/dev0a5432d2c).compute01 run of the same files with my two fixes is in progress (
~claude/j386-evidence/c01-failing.log). Next: triage each remaining family into stale spec (fix) / load-dependent (fix or isolate) / product bug (explain, leave).Finding 4 (compute01 vs dev-02, the real differences). Run of the 38 failing spec files on compute01 with fixes 1 and 2: 71 failed, 310 passed (
~claude/j386-evidence/c01-failing.log); dev-02 unpatched: 82 failed, 299 passed. Fonts, Chromium (both chromium-1228/1254 trees, Playwright 1.65.0), env and locale are NOT the cause:fc-matchresolves sans/mono/serif to DejaVu on both; no spec failed for a missing font. What differs:878a8a68b,991a10515.signin-mobile-diff.pngin the art dir, 18% of pixels, same fonts). Fix: baselines per architecture (695bc21a7); x64 set recorded on compute01.s-terminal-hosts, Keys paged-reference/keys. Fixed in5d933591d,f07700e1c, and the sessions-canvas commit.infraternal.canvas.*key), wheel-scroll x2 (sideways wheel moves nothing), perf-hud. predictive-backspace/echo x12 are being fixed onfix-predictive-echo-specs; core-screen/platform-consistency/terminal RTT by #430 (already in the base).Load-only timing: mesh-perf drag median 11.9 ms vs bound 3 ms on a contended host; perf-hud stall. These belong on the perf VM (PROCESS §1).
Progress, head
8d96733f1onfix-compute01-browser-baseline. Touched-spec run on compute01 (~claude/j386-evidence/touched.log): 176 passed, 11 failed. All of ca-unlock, inbox, machine-pill-flicker, mesh-rename, startup-demo, mesh, sessions-canvas and font-metrics/font-weight (23 cases) now pass. The 11: addhost-pill-stream x8 (pill click does not open the "Setup of instant-fail.lab" dialog; probing), terminal-links x1 and wheel-scroll x2 (fixed in 3 further commits, verification queued).Two corrections to earlier notes: (a) terminal-links: the first read was the early one (302x217 mid-ease; settled 308x221), so both reads now settle. (b) wheel-scroll sideways: the Keys page is the last of 12 Docs stops, so a forward gesture has nowhere to go; spec fixed, not a product bug.
x64 sign-in baselines recorded on compute01 and checked (
snap.log: UPDATE_EXIT=0, CHECK_EXIT=0, 5 passed).Full-suite runs on both hosts at the final head are queued behind other jobs (dev-02 position ~11, compute01 after the verification run).
Status (full-suite runs in progress at head
d42bdd449): compute01 350 of ~1290 tests done at load 25-33 (16 vCPU, 5 build slots busy), dev-02 391. Logs:~claude/j386-evidence/full.logon each host.Since the last comment: verification run (
two.log, 6 passed) cleared terminal-links and wheel-scroll; addhost-pill-stream's eight cases fail because the confirm tip's accessible name became its message (#391, aria-labelledby beats aria-label), fixed ind42bdd449. The same stale name also hits addhost-pill.spec.ts:176 (found by the full run; fix is local, will be committed after the run). Early failures in the full run that were not in J367's list: access-level.spec:127 (tooltip overlaps a field), addhost-pill.spec:93 (a 303 ms long task during the ring, a timing assertion on a host at load 30), canvas.spec:590 (shortcut capsule). I will classify them from the run's artifacts.Full suite at head
d42bdd449(spec fixes so far; logs~claude/j386-evidence/full.logon each host, artifactsart-full/):Finding 5, the host difference that is NOT load: the test double answers "this host" with
os.hostname()(mock-server.ts). compute01's isinfraternal-dev-01-compute01(28 chars), dev-02'sinfraternal-dev-02-std(22). The name is drawn in the machine pill, so canvas.spec:590 measures the shortcut list 560 px wide against a 573.7 px pill, and access-level.spec:127's tooltip overlaps its field; both fail on every compute01 run (rerun at5f04aa42f: same two fail again) and pass on dev-02. Fonts and Chromium are identical (Chrome for Testing 158.0.8127.18 both; same fallback chain; compute01 only adds Liberation Sans Narrow). Fixed ina3f0f9df1: a constanttest-host.Rerun of the 18 compute01-only files at
5f04aa42fwith fewer neighbours (rerun.log): 9 failed, 151 passed, so 11 of the 20 were load flakes (addhost-pill ring long task, row swipes, onboarding, setup-layout, ...). Still failing: access-level, canvas:590, canvas:767 (hostname, being rechecked), hosts-new-window-review (rechecking), sign-out:309 (dev drift), predictive-echo:130 (fix-predictive-echo-specs), and three timing specs that assert frame cost: clusters-frames:60 and motion-audit:39 ("at 4x CPU") and mesh-perf:47 (drag median 11.9 ms vs 3 ms): PROCESS §1 puts those on the perf VM; on a shared host at load 20-30 they cannot pass.Both-host failures (19, not environment, not fixed here): swipes x5 (Settings view no longer has nine side-by-side windows:
stopsis 5), docs-palette x4 (palette Enter does not open the multiplexer page), glass-ghost x4 (toast text shows through at DPR 3), mesh-view-overlap, perf-hud, phone-polish x2, sign-out:309, clusters:512. dev-02 only (7): keytray-modifiers, mesh:122, palette-polish x2 (57.87 vs 58 px), terminal (prediction state), toast-stack x2 (cards behind the front have the same width).Full suite at head
a3f0f9df1(includes the hostname fix; logs~claude/j386-evidence/full2.logon each host):d42bdd449: 26 failed. J367's dev-02 numbers for these files: 82 failed of 381 before the spec fixes.The two sets share 19 failures that are not environment: swipes x6 (Settings has 5 stops, not 9), docs-palette x4, glass-ghost x4, mesh-view-overlap, perf-hud, phone-polish x2, sign-out:309, clusters:512 (each needs its owner; the errors are in the issue above and the logs).
compute01-only (19) in that run: all but access-level and hosts-new-window-review are timing or frame-budget specs (view flights within 350 ms, popover within 200 ms, "at 4x CPU" motion audit, synchronized-output release, mesh frame budgets, version-pill script cost, row swipes, keyboard split) that ran at load 30+. access-level and hosts-new-window-review are fixed by later commits (
d0a0c8b0c,a66700652) that this run did not contain. A rerun of those 18 files at the branch tip is queued (rerun3.log).dev-02-only (5): toast-stack x2 (cards behind the front have equal widths), keytray-modifiers, palette-polish (57.87 vs 58 px), addhost-wizard:531 (strict mode: the leaving pane and the new one both match; passed on dev-02 in the first run, a flake).
Finish. Branch
fix-compute01-browser-baseline, head47a1d612d(base origin/dev0a5432d2c, which already had #430). Not merged, not deployed. The gate (scripts/verify fast) was not run: the change is test-side only (spec files, the test double, playwright.config.ts, 4 PNG baselines), and the browser suite is what I ran.Root causes, by what the evidence shows:
878a8a68b): Node's 5 s keep-alive timeout vs a spec's reused request socket:ECONNRESETon/__mock/*. font-metrics/font-weight 15 cases, in other specs too. Failed on dev-02 as well (7+8) once it was loaded.os.hostname()(fixed,a3f0f9df1): 28 chars on compute01, 22 on dev-02, drawn in the machine pill: canvas:590 failed on every compute01 run, passed after.695bc21a7+2551bfa33): recovery-ui-hold 5/5 on compute01.s-terminal-hosts,d-reference/keysand last-stop direction (wheel-scroll), confirm tip named by its message (addhost-pill-stream x8, addhost-pill:166), two reads taken mid-ease (terminal-links), canvas:767 toast rising (47a1d612d's parent, not validated on its own).Not environment, and not what J367 reported: Chromium (158.0.8127.18) and fallback fonts are identical on both hosts; "dev-02 passes" was only true for some specs (82 of 381 failed there before these fixes).
Results (full suite, 147 skipped each time):
| host | head | result |
| compute01, load 29-36 |
a3f0f9df1| 38 failed, 1095 passed (4.6 h) || compute01, J367 base | unmodified | 104 failed, 997 passed |
| dev-02 |
a3f0f9df1| 24 failed, 1109 passed (3.4 h) || dev-02 |
d42bdd449| 26 failed, 1107 passed |The suite is NOT green on compute01. Rerun of the compute01-only failures at
a66700652with the load at 19-26 (rerun3.log): 14 failed of 205 (the 3 below the commit line are spec reverts,1d0391ce2and47a1d612d, because those two changes did not help):art-dbg/access-rest.pngwas on compute01), hosts-new-window-review (no host list after pressing New window). I could not find the cause.verify fast?).Logs:
~claude/j386-evidence/{full,full2,rerun,rerun3}.logon compute01, same names on dev-02 for full/full2.Review of
fix-compute01-browser-baseline@47a1d612d0(base0a5432d2c)Verdict: APPROVE, provisional. The change is test-side only and I found no spec edit that hides a product bug. Merging needs the mechanical rebase in P2-1 first. Item 5, the full suite on the trial merge, is still in the build-slot queue. I will add its result as an addendum and change the verdict only if it shows a regression against dev.
Trial merge:
origin/devbe54e662d+ this branch. Reviewed from the diff0a5432d2c..47a1d612d(19 commits, 24 files) and the product code the specs touch.P1
None.
P2
P2-1. Merge conflict, and a wrong resolution loses a fix (item 4).
apps/tracer/test/mock-server.tsis the only conflict. Dev already has the same keep-alive fix as #438 (96ea2ac9c:server.keepAliveTimeout = 0plusmock-keepalive.spec.ts), so both sides add the same line with different comments.198c4a736) nor #427 (c442500c2) changed any file this branch edits exceptmock-server.ts, via #438, #440 and #314.import { DOUBLE_HOSTNAME }and theunlock-sessionreply. When I took dev's side of the file whole (checkout --ours), theos.hostname()fix silently disappeared, andcanvas:590would be red again on compute01. I re-applied it by hand in the trial merge.878a8a68binstead of leaving it to the merger.P2-2. A constant host name removes all coverage for long machine names (item 1).
canvas.spec:590(shortcuts) assertspanel.width > capsule.width. With compute01's 28-character name the capsule was 573.7 px against a 560 px panel.access-level:127also failed only with that name.infraternal-dev-01-compute01produces exactly that. The constant is the right fix for the test double, because a spec must not depend on the build host. But it turns "a long name breaks the layout" into a silent gap.P2-3.
access-level.spec:127is still red on compute01 and is not explained (item 1).P3
P3-1. The mid-ease waits absorb a slow animation (item 1).
canvas.spec:806(expect.poll(bottom < 40)) norterminal-linksmeasureSettled(two equal reads) bounds how long the motion takes. A toast or tooltip that took 2 s to settle would pass.TRAVEL = 200ms with ease-out (tooltip.ts:39), and the width swap uses the same constant. But nothing in these specs would catch a regression past the owner's ≤ 300 ms rule (2026-11-09)..last()is the newest (toast.ts:476). I only ask for a bound, or for the J428 gate to cover these two surfaces. A bound would be waiting ongetAnimations()to finish and failing if that takes more than 300 ms plus slack, which also settles the read.P3-2. A confirm tip's
labeloption is dead (item 1).mountConfirmTipsets botharia-label(tooltip.ts:224) andaria-labelledby(:235). The second wins, so the dialog's name is its whole message ("o2 couldn't join this server…"), andlabel: "Setup of o2"(setup-pill.on-demand.ts:196) never reaches assistive technology. The spec edits (8 dialog-name lookups) follow the product correctly.P3-3. Sign-in baselines (item 2). The differences are rendering noise, not layout. I decoded each arm64/x64 pair and counted the differing pixels:
The dimensions are identical, and every difference lies in a band around the card (desktop dark x 405–1034, y 268–697; mobile dark spans the full width, y 252–665). That is shadow gradient and compositing rounding: no delta above 2, so no edge moved. The one thing to check is that the x64 set was recorded on compute01 by
--update-snapshots. It agrees with the arm64 originals to within 2/255, so I accept it. The config comment mentions "text edges", but the data only supports blur and rounding. Since the whole difference is ≤ 2/255, a smallthreshold(say 0.02, withmaxDiffPixels: 0) would remove 4 PNGs and the per-architecture template, and would still catch any layout, colour or text change. That is a design choice for the owner. Per-architecture files are correct as written. Nothing else inapps/tracerusestoHaveScreenshot, so the template change affects only this spec.P3-4. Keep-alive in the double (item 3). The reasoning holds. A Node 5 s idle close races a reused
context.requestsocket, and the fix is in the test double only. It cannot mask a server bug: the double is not the product, and the real server is not involved. Dev's #438 is the better version, with its own regression spec. If you want the product's idle-close behaviour checked against browser connection reuse, that is a separate issue.P3-5. History. The branch carries two commit/revert pairs (
a66700652reverted by47a1d612d, and the access-level change reverted by1d0391ce2). Squash them out before merging so each commit is one change.What I checked and found sound
.last(), the sessions-canvas observer, thefilter({hasText})count). New cards are appended, so.last()is the newest. The observer counts a card the first time it has text, which matches "a repeat only counts up".s-terminal-hosts,d-reference/keysand the last-stop wheel direction. All follow product renames and structure: Keys is the last of 12 Docs stops, and a forward gesture has nowhere to go.hostname()uses (cell-metrics,palette-navigation,terminal-cell-position) only print the environment.The
@perftagging decisionThe branch makes it easy and does not get in the way.
playwright testcall:scripts/verify:68,scripts/nightly-browser-suite.py(bun x playwright test) andbun run test. A singlegrepInvert: /@perf/inapps/tracer/playwright.config.tscovers compute01, dev-02 and the nightly. The perf VM would turn it off with an env var. This branch only adds one unrelated line to that config, so there is no conflict.{ tag: "@perf" }option, which suitsmesh.spec.ts:193because its title is generated in a loop. Nothing is tagged today.mesh-perf.spec.ts:47,mesh.spec.ts:193(thefor (const rate of [1, 4])test),motion-audit.spec.ts:39andclusters-keyboard-split.spec.ts:21. J386's lists also nameclusters-frames:60,perf-hudand row-swipe-continuity as load-bound. The follow-up should decide those too.Item 5: the full suite on the trial merge
build-slot, same steps asscripts/nightly-browser-suite.py, port 4747.~claude/.cache/codex-scratch/review434/suite.logandresults.jsonon compute01.a3f0f9df1: 38 failed, 1095 passed; J367's unmodified base: 104 failed).verify.Addendum to my review of
47a1d612d: item 5 (the full suite on the trial merge) was NOT runI queued it on compute01 through
build-slotat 16:09 UTC. Over the next ~30 min it moved from position 13 to 9 of 14, with all 6 slots held byverify fastruns. Once it gets a slot the suite needs about 3 to 5 hours at the load J386 saw, so a result would not come back in this review. I removed my queue entry by its exact PIDs (build-slot shows no entry for it) so no orphan run starts later with nobody reading it. The verdict above is therefore based on the diff, the product code and the PNG comparison, not on a suite run. Nothing ran on compute01 beyondbun --versionand the file copy.be54e662d+ branch, with the hostname hunk re-applied by hand, see P2-1) is in~claude/worktrees/review434on compute01, and~claude/.cache/codex-scratch/review434/run.shruns the same steps as the nightly on port 4747. Launch withbuild-slot nice -n10 nix develop path:/home/claude/worktrees/review434 -c ./run.shfrom that scratch directory.~/Developer/Worktrees/infraternal-review434, detached at 0cc1b1d0d + 1 commit.Round 3 (J445's requests). Branch rebuilt on origin/dev (
5eb968744) with the keep-alive commit, both commit/revert pairs and the merge commit dropped; force-pushed with lease, heada9a68b702(18 commits, all spec/test-double work except 3 ui commits).grepInvert: /@perf/once in playwright.config.ts unlessTRACER_PERF=1(the--grep-invertflags in verify and the nightly script are gone). Tagged: mesh-perf, mesh frame budgets, motion-audit, clusters-keyboard-split, clusters-frames (frame budget at 1x/4x CPU). Not tagged, with the reason in PROCESS.md: perf-hud (checks an injected stall is recorded) and row-swipe-continuity (checks positions, only logs frame times).shortcuts-view.ts). New speclong-machine-name.spec.ts(1440x900 and 393x852) withPOST /__mock/hostnamein the double. 2 passed on dev-02.scroll-margin-bottom: 3.5remon the consent card. Passes on dev-02; not yet re-run on compute01.labeloption of confirm tips (10 callers, one caught by typecheck;bun run checknow passes).Focused run on dev-02 at
a9a68b702(~claude/j386-evidence/r3.log): 65 passed, 1 failed: canvas:871 (palette::beforeinset 4.4 vs 3.3: origin/dev drift, not mine). Full suite is running on dev-02 (load 40-170 from other jobs).