[world-postgres] Preserve Error fields in Graphile Worker log metadata by VaguelySerious · Pull Request #4138 · vercel/workflow

VaguelySerious · 2026-09-12T00:03:51Z

Fixes #4116, closes #4117.

Carries #4117 (@komly) into a signed PR with one review finding addressed. The original author is credited via Co-authored-by.

What

createGraphileLogger serialized Graphile Worker's meta with a bare JSON.stringify, which renders an Error as {} because name, message, stack, and cause are non-enumerable. A failed delivery logged "error": {}, and a transport cause such as UND_ERR_SOCKET (relevant to diagnosing #3811) was lost entirely. Errors in metadata are now expanded to those fields plus their enumerable properties (e.g. code), recursively through cause and AggregateError.errors. DEBUG level filtering and WORKFLOW_JSON_MODE=1 suppression are unchanged.

Change relative to #4117: its replacer recursed into cause with no cycle guard, so a cyclic cause chain (a.cause = b; b.cause = a) overflows the stack inside JSON.stringify (verified). Graphile has no fallback for a logger that throws. The serializer now tracks expanded errors and replaces a repeat with { name, message, repeated: true }, and also carries AggregateError.errors, which {...error} does not copy. The serializer is exported as serializeGraphileMeta so it can be unit-tested directly.

Dropped from #4117: the README section, and the WORKFLOW_POSTGRES_URL branch in the integration test (it threw on a non-loopback URL; the test now always uses Testcontainers like the package's other integration tests).

Tests

src/queue-logging.test.ts (unit): expands the fields JSON.stringify drops; keeps enumerable code and recurses through cause and AggregateError; does not throw on a cyclic cause chain.
test/queue-logging.test.ts (Testcontainers, from fix(world-postgres): preserve queue error metadata #4117): a real Graphile Worker in a subprocess delivering to a loopback 503 handler; asserts the error name, message, and stack appear in the stderr metadata (fails on main with {}), and that WORKFLOW_JSON_MODE=1 still produces no output.

🤖 Generated with Claude Code

…adata `createGraphileLogger` serialized `meta` with a bare `JSON.stringify`, which renders an `Error` as `{}` because `name`, `message`, `stack`, and `cause` are non-enumerable. A failed delivery therefore logged `"error": {}` and the transport cause (e.g. `UND_ERR_SOCKET`) was lost. Errors are now expanded to those fields plus their enumerable properties, recursively through `cause` and `AggregateError.errors`, with already-expanded errors replaced by a marker so a cyclic cause chain cannot make the logger throw. Co-authored-by: Dmitry Petrov <Komly@yandex.ru> Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

changeset-bot · 2026-09-12T00:03:56Z

🦋 Changeset detected

Latest commit: dfc43e6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@workflow/world-postgres	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

vercel · 2026-09-12T00:04:08Z

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
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github-actions · 2026-09-12T00:04:12Z

🧪 E2E Test Results

✅ All tests passed

⚠️ Flaky E2E Tests (passed on retry)

These tests failed at least once and passed on a retry. A recurring entry here is a real race worth investigating.

sleepWinsRaceWorkflow (vite · local-dev / local / quickjs / stable)

🛠 Infra Events (absorbed by the harness)

Platform anomalies the e2e harness detected and worked around (e.g. a run the queue never picked up, replaced by a fresh run). Clustered timestamps indicate a backend blip; a steady drip indicates a platform issue worth escalating.

cold-start-warmup · suite warmup (tanstack-start) · at 00:06:58Z · abandoned wrun_01M29EZQ6Q3DBP1YBP93R515S8
run-pickup-stall · hookCleanupTestWorkflow - hook token reuse after workflow completion (nextjs-webpack) · at 00:12:03Z · abandoned wrun_01M29F9G8RAPAQFECS2T6DBNNM

E2E Test Summary

Summary

	Passed	Skipped	Total
✅ ▲ Vercel Production	3662	685	4347
✅ 💻 Local Development	3998	510	4508
✅ 📦 Local Production	3998	510	4508
✅ 🐘 Local Postgres	3998	510	4508
✅ 🪟 Windows	320	2	322
✅ 🌐 Cross-language Conformance	68	74	142
✅ vercel-http-transport	823	143	966
✅ vercel-multi-region	27	0	27
✅ vercel-ws-transport	557	87	644
Total	17451	2521	19972

Details by Category

✅ ▲ Vercel Production

App	Passed	Skipped
✅ astro-node	133	28
✅ astro-quickjs	133	28
✅ example-node	133	28
✅ example-quickjs	133	28
✅ express-node	133	28
✅ express-quickjs	133	28
✅ fastify-node	133	28
✅ fastify-quickjs	133	28
✅ hono-node	133	28
✅ hono-quickjs	133	28
✅ nest-node	133	28
✅ nest-quickjs	133	28
✅ nextjs-turbopack-node	158	3
✅ nextjs-turbopack-quickjs	158	3
✅ nextjs-webpack-node	158	3
✅ nextjs-webpack-quickjs	158	3
✅ nitro-node	133	28
✅ nitro-quickjs	133	28
✅ nuxt-node	133	28
✅ nuxt-quickjs	133	28
✅ python-node	66	95
✅ sveltekit-node	152	9
✅ sveltekit-quickjs	152	9
✅ tanstack-start-node	133	28
✅ tanstack-start-quickjs	133	28
✅ vite-node	133	28
✅ vite-quickjs	133	28

✅ 💻 Local Development

App	Passed	Skipped
✅ astro-stable-node	134	27
✅ astro-stable-quickjs	134	27
✅ express-stable-node	134	27
✅ express-stable-quickjs	134	27
✅ fastify-stable-node	134	27
✅ fastify-stable-quickjs	134	27
✅ hono-stable-node	134	27
✅ hono-stable-quickjs	134	27
✅ nest-stable-node	134	27
✅ nest-stable-quickjs	134	27
✅ nextjs-turbopack-canary-node	160	1
✅ nextjs-turbopack-canary-quickjs	160	1
✅ nextjs-turbopack-stable-node	160	1
✅ nextjs-turbopack-stable-quickjs	160	1
✅ nextjs-webpack-canary-node	160	1
✅ nextjs-webpack-canary-quickjs	160	1
✅ nextjs-webpack-stable-node	160	1
✅ nextjs-webpack-stable-quickjs	160	1
✅ nitro-stable-node	134	27
✅ nitro-stable-quickjs	134	27
✅ nuxt-stable-node	134	27
✅ nuxt-stable-quickjs	134	27
✅ sveltekit-stable-node	153	8
✅ sveltekit-stable-quickjs	153	8
✅ tanstack-start-node	134	27
✅ tanstack-start-quickjs	134	27
✅ vite-stable-node	134	27
✅ vite-stable-quickjs	134	27

✅ 📦 Local Production

App	Passed	Skipped
✅ astro-stable-node	134	27
✅ astro-stable-quickjs	134	27
✅ express-stable-node	134	27
✅ express-stable-quickjs	134	27
✅ fastify-stable-node	134	27
✅ fastify-stable-quickjs	134	27
✅ hono-stable-node	134	27
✅ hono-stable-quickjs	134	27
✅ nest-stable-node	134	27
✅ nest-stable-quickjs	134	27
✅ nextjs-turbopack-canary-node	160	1
✅ nextjs-turbopack-canary-quickjs	160	1
✅ nextjs-turbopack-stable-node	160	1
✅ nextjs-turbopack-stable-quickjs	160	1
✅ nextjs-webpack-canary-node	160	1
✅ nextjs-webpack-canary-quickjs	160	1
✅ nextjs-webpack-stable-node	160	1
✅ nextjs-webpack-stable-quickjs	160	1
✅ nitro-stable-node	134	27
✅ nitro-stable-quickjs	134	27
✅ nuxt-stable-node	134	27
✅ nuxt-stable-quickjs	134	27
✅ sveltekit-stable-node	153	8
✅ sveltekit-stable-quickjs	153	8
✅ tanstack-start-node	134	27
✅ tanstack-start-quickjs	134	27
✅ vite-stable-node	134	27
✅ vite-stable-quickjs	134	27

✅ 🐘 Local Postgres

App	Passed	Skipped
✅ astro-stable-node	134	27
✅ astro-stable-quickjs	134	27
✅ express-stable-node	134	27
✅ express-stable-quickjs	134	27
✅ fastify-stable-node	134	27
✅ fastify-stable-quickjs	134	27
✅ hono-stable-node	134	27
✅ hono-stable-quickjs	134	27
✅ nest-stable-node	134	27
✅ nest-stable-quickjs	134	27
✅ nextjs-turbopack-canary-node	160	1
✅ nextjs-turbopack-canary-quickjs	160	1
✅ nextjs-turbopack-stable-node	160	1
✅ nextjs-turbopack-stable-quickjs	160	1
✅ nextjs-webpack-canary-node	160	1
✅ nextjs-webpack-canary-quickjs	160	1
✅ nextjs-webpack-stable-node	160	1
✅ nextjs-webpack-stable-quickjs	160	1
✅ nitro-stable-node	134	27
✅ nitro-stable-quickjs	134	27
✅ nuxt-stable-node	134	27
✅ nuxt-stable-quickjs	134	27
✅ sveltekit-stable-node	153	8
✅ sveltekit-stable-quickjs	153	8
✅ tanstack-start-node	134	27
✅ tanstack-start-quickjs	134	27
✅ vite-stable-node	134	27
✅ vite-stable-quickjs	134	27

✅ 🪟 Windows

App	Passed	Failed	Skipped
✅ nextjs-turbopack-node	160	0	1
✅ nextjs-turbopack-quickjs	160	0	1

✅ 🌐 Cross-language Conformance

App	Passed	Failed	Skipped
✅ python	68	0	74

✅ vercel-http-transport

App	Passed	Skipped
✅ example	133	28
✅ express	133	28
✅ hono	133	28
✅ nextjs-turbopack	158	3
✅ nitro	133	28
✅ vite	133	28

✅ vercel-multi-region

App	Passed	Failed	Skipped
✅ nextjs-turbopack	27	0	0

✅ vercel-ws-transport

App	Passed	Skipped
✅ example	133	28
✅ express	133	28
✅ nextjs-turbopack	158	3
✅ vite	133	28

📋 View full workflow run

github-actions · 2026-09-12T00:04:12Z

📊 Workflow Benchmarks

commit dfc43e6 · Sat, 12 Sep 2026 00:29:08 GMT · run logs

Backend: vercel · app: nextjs-turbopack

Metric	Scenario	Best (ms)	P75 (ms)	P90 (ms)	P99 (ms)	Samples
TTFS	step	207 (-84%) 💚	1817 🔴 (+29%) 🔻	1925 🔴 (+33%) 🔻	1972 🔴 (+19%) 🔻	30
TTFS	stream	272 (+24%) 🔻	1898 🔴 (+39%) 🔻	1928 🔴 (+40%) 🔻	1982 🔴 (+36%) 🔻	30
TTFS	hook + stream	1844 (+14%)	2165 🔴 (+25%) 🔻	2292 🔴 (+30%) 🔻	2421 🔴 (+23%) 🔻	30
Fan-out TTFS	Promise.all(100 steps)	506 (+7.0%)	766 (+11%)	802 (-7.2%)	2175 (+23%) 🔻	10
Fan-out TTLS	Promise.all(100 steps)	2543 (+33%) 🔻	5261 (+99%) 🔻	5777 (+29%) 🔻	8937 (+15%) 🔻	10
STSO	1020 steps (inline)	125 (-3.1%)	156 (-5.5%)	175 (-6.4%)	303 (-15%)	1019
WO	1020 steps	154918 (-6.2%)	154918 (-6.2%)	154918 (-6.2%)	154918 (-6.2%)	1
CRTT	first chunk (pooled)	62 (+1.6%)	105 (-28%) 💚	131 (-41%) 💚	177 (-54%) 💚	28

Streams

Scenario	CRTT 1st	p75	p90	p99	CDV max	iters
paced control (100/s, 60B)	103 (-3%)	190 (-37%)	245 (-32%)	445 (-27%)	197 (-8%)	10
size sweep (100/s, 160B-12KB)	96 (-21%)	184 (-65%)	264 (-66%)	563 (-44%)	180 (-53%)	10
replay gateway-gpt-5.4-nano-2000t (1x)	95 (-23%)	172 (-40%)	210 (-60%)	366 (-63%)	286 (-20%)	3
replay eve-gpt-5.6-sol-2000t (1x)	84.5 (-40%)	153 (-32%)	190 (-34%)	520 (+1%)	392 (+19%)	2
replay eve-gpt-5.6-sol-2000t (2x)	79 (-42%)	215 (-53%)	298 (-62%)	588 (-48%)	246 (-61%)	3

📈 STSO distribution vs main (inline / queue-hop histograms)

1020 steps (inline)

Cumulative STSO time: main 164862ms → this run 154738ms (Δ -10124ms, -6%)

100-150 ms  █████████████████░░░░░░┃  main 483  this 679  +196
150-200 ms  ██████████┃█████          main 465  this 303  -162
200-250 ms  ┃                         main  34  this  24   -10
250-300 ms  ┃                         main  15  this   2   -13
300-350 ms  ┃                         main  11  this   3    -8
350-400 ms  ┃                         main   6  this   6    +0
400-450 ms  ┃                         main   2  this   2    +0
450-500 ms  ┃                         main   1  this   0    -1
500-550 ms  ┃                         main   1  this   0    -1
600-650 ms  ┃                         main   1  this   0    -1

📈 CRTT drill-down vs main (RTT distributions & profiles)

variant  RTT 1ms→5s+             avg         p50         p90         p99     n
control  ······▂█▂····  148.5 (-28%)  138 (-23%)  245 (-32%)  445 (-27%)  3000
sweep    ······▁█▂▁···  157.4 (-46%)  144 (-37%)  264 (-66%)  563 (-44%)  3000
gw 1x    ·····▁▂█▁▁···  144.2 (-30%)  132 (-20%)  210 (-60%)  366 (-63%)  5295
eve 1x   ·····▁▃█▁▁···    135 (-28%)  121 (-28%)  190 (-34%)   520 (+1%)  5186
eve 2x   ·····▁▁█▄▁···    179 (-47%)  158 (-38%)  298 (-62%)  588 (-48%)  7779

RTT over stream progress (avg per tenth of stream, bars scaled min→max):

control  ▆█▅▅▆▄▁▃▁▃  128–174ms
sweep    ▆▆▅▄█▆▃▃▁▁  138–179ms
gw 1x    ▄▃█▂▃▄▁▂▂▂  135–168ms
eve 1x   ▂▁▂▂▁▁█▄▂▂  118–191ms
eve 2x   ▂▁▁▂▁▁▃█▃▁  151–303ms

RTT by chunk size (avg per log size bin, ~160B → ~12KB serialized, bars scaled min→max):

sweep  ▄▄▁▃█▇▆  155–160ms

Delivery jitter over stream progress (avg positive CDV per tenth of stream, bars scaled min→max):

control  ▆▅▄▆▁▁▃▆▂█  39–56ms
sweep    ▁█▄▅▅▅▆▁▂▂  55–78ms
gw 1x    ▄▅▆▁▆█▄▄▄▄  39–55ms
eve 1x   ▂▂▁▂▄▃█▄▃▆  23–36ms
eve 2x   █▆▂▄▆▁▄▂▂▃  24–38ms

ℹ️ Metric definitions & methodology

_{Streams: first-chunk RTT (the stream-open path, before any buffering/backpressure), CRTT percentiles, and worst delivery stall (CDV max). Cells are medians across iterations; per-run values in the artifacts. No 🔴/🟢 marks until targets attach.}

_{The collapsed STSO distribution section above buckets every step gap, split inline (same warm process — pure framework overhead) vs queue-hop (fresh process — dispatch, reinit, replay). █ = main, ┃ = this run, ░ = fill.}

_{The collapsed CRTT drill-down: per-variant RTT histograms (fixed log bins, · = empty) and mean RTT/positive-CDV profile lines over stream progress and chunk size. Histograms, avgs, and profiles merge exactly across runs; p50–p99 are percentile-of-percentiles. Per-index rows live in the artifacts.}

_{Best/P75/P90/P99 deltas compare against the most recent benchmark run on main at the time of this run. 🔻 flags a delta worse than +15%, 💚 one better than −15%.}

_{Metrics — TTFS: time to first step body (in-deployment start() → first step body) · Fan-out TTFS: fan-out time to first step (in-deployment start() → first of the parallel step bodies to complete) · Fan-out TTLS: fan-out time to last step (in-deployment start() → last of the parallel step bodies to complete, i.e. when the Promise.all resolves) · STSO: step-to-step overhead (gap between consecutive step bodies) · WO: workflow overhead (whole-run time outside step bodies, in-deployment anchored) · CRTT: chunk round-trip time (per-chunk write → read latency, one clock domain: deployment → stream backend → same deployment) · CDV: chunk delay variation / delivery jitter (inter-arrival gap minus inter-write gap per seq-adjacent pair; skew-free; the row is each run's MAX positive value, so one stall moves it)}

_{Scenarios — step: one trivial no-op step, no stream; no hooks, so the run stays in turbo mode (in-process fast path) · stream: one streaming step; no hooks, so the run stays in turbo mode (in-process fast path) · hook + stream: registers a hook before one step, which exits turbo mode (dispatch path) · 1020 steps: 1020 trivial sequential steps; STSO is measured between consecutive steps in the given step ranges, and WO is the whole-run overhead outside step bodies · Promise.all(100 steps): 100 trivial no-op steps started together in a single Promise.all; Fan-out TTFS is the first of them to complete and Fan-out TTLS the last, both from the in-deployment clientStart, so their gap is the spread the runtime adds across the fan-out · paced control (100/s, 60B): the control: 300 tiny (~60B) deltas metronome-paced at 100/s — zero workload structure, so it reads the transport floor and flush cadence, and disambiguates transport-wide vs workload-specific when a replay row moves · size sweep (100/s, 160B-12KB): same pacing as the control with deltas padded in rotation across seven log-spaced sizes (~160B–12KB) — rotation decouples size from stream position, so it isolates whether chunk size causes latency · replay gateway-gpt-5.4-nano-2000t (1x): raw provider SSE cadence captured at the AI gateway boundary (gpt-5.4-nano, the most popular gateway model; per-token deltas p50 208B = the modal production chunk size), replayed exactly as measured — the typical customer's workload; its CDV is the typical customer's real delivery jitter · replay eve-gpt-5.6-sol-2000t (1x): a captured eve turn (gpt-5.6-sol, the most-used demanding eve model; ~2000 output tokens = production p50 turn length) replayed exactly as measured — eve's envelope protocol re-ships the cumulative message so sizes ramp 142B→13KB; the demanding outlier tenant's reality · replay eve-gpt-5.6-sol-2000t (2x): the same eve capture at 2x — the headroom/stress row; real fast-tier models emit the same chunk sizes at proportionally higher rate, so time compression is a faithful speed model · first chunk (pooled): every run's seq-0 RTT pooled across all stream scenarios — the first chunk precedes any workload differentiation, so pooling samples one shared stream-open path with exact percentiles}

_{Replay cadences (semantic sha256) — eve-gpt-5.6-sol-2000t eaf22f5946e7c61f3c65c7006d550df180cfabd4e706254a09f22aec0cfb420d · gateway-gpt-5.4-nano-2000t 6f24ac518b6b83ff1d0e85a5fe78230db192716d66a7fc6b2fe022752001d041}

_{🔴 marks a percentile over its target (within target is left unmarked). Targets (p75/p90/p99, ms) — TTFS 200/300/600}

_{All timestamps are deployment-side; runs are triggered in-deployment, so the CI runner and api.vercel.com sit outside every measured window. TTFS = start() → first step body (includes dispatch + any cold start); Fan-out TTFS/TTLS = first/last step completion of one Promise.all from the same anchor (the gap is the runtime’s fan-out spread); STSO/WO between step bodies; CRTT inside the workflow (excludes the api.vercel.com read path).}

_{Cold starts stay in the numbers (real bursty-workload latency, inflates P75+); Best is the warm floor.}

github-actions · 2026-09-12T00:05:21Z

Sim World

Simulated world deterministic testing for races. Traces

🟠 world-sim scenario book — 1 fail of 41 total

fence=per-spec

scenario	outcome	events	virt	replay
✅ `smoke-no-steps`	completed	3	0ms	ok
✅ `smoke-one-step`	completed	6	0ms	ok
✅ `hook-at-step-started`	completed	12	0ms	ok
✅ `hook-at-step-completed`	completed	12	0ms	ok
✅ `hook-at-hook-created`	completed	12	0ms	ok
✅ `deadline-hook-wins`	completed	7	1.0h	ok
✅ `deadline-expires`	completed	7	1.0h	ok
✅ `long-sleep`	completed	11	30.0d	ok
✅ `hook-never-arrives`	stalled	3	0ms	skipped
✅ `step-retries-twice`	completed	10	2.0s	ok
✅ `parallel-steps`	completed	9	0ms	ok
✅ `hook-on-execution-state`	completed	12	0ms	ok
✅ `peek-hook-before-branch`	completed	12	0ms	ok
✅ `peek-hook-after-branch`	completed	12	0ms	ok
✅ `peek-hook-at-registration`	completed	12	0ms	ok
✅ `race-hook-before-probe`	completed	12	0ms	ok
✅ `race-hook-after-probe`	completed	12	0ms	ok
✅ `race-duplicate-delivery`	completed	13	0ms	ok
✅ `attr-hook-before-step`	completed	11	0ms	ok
✅ `attr-hook-after-step`	completed	11	0ms	ok
✅ `attr-from-step-body`	completed	13	0ms	ok
✅ `fork-hook-after-timeout`	completed	14	1.0m	ok
✅ `fork-hook-before-timeout`	completed	14	1.0m	ok
✅ `count-hook-after-timeout`	completed	17	1.0m	ok
✅ `count-hook-before-timeout`	completed	20	1.0m	ok
✅ `stale-read-step-count-fork`	completed	20	1.0m	ok
✅ `stale-read-equal-step-counts`	completed	14	1.0m	ok
✅ `step-vs-step-fork`	completed	12	0ms	ok
✅ `step-vs-step-fork-fenced`	completed	12	0ms	ok
✅ `fence-catches-benign-direction`	completed	12	5ms	ok
✅ `in-flight-before-decision`	completed	17	1.0m	ok
❌ `in-flight-before-decision-counted`	completed	17	1.0m	ok
✅ `in-flight-after-decision`	completed	19	2.0m	ok
✅ `stale-read-step-count-fork-fenced`	completed	20	1.0m	ok
✅ `fork-hook-wins`	completed	13	1.0m	ok
✅ `fork-timeout-wins`	completed	13	1.0m	ok
✅ `unclaimed-payload-under-fork`	completed	17	1.0m	ok
✅ `claimed-payload-under-fork`	completed	17	1.0m	ok
✅ `writers-independent-step-bodies`	completed	12	0ms	ok
✅ `writers-scripted-tempo`	completed	12	0ms	ok
✅ `cancel-mid-step`	cancelled	7	0ms	skipped

Full trace: world-sim.txt

github-actions · 2026-09-12T00:06:12Z

Framework	Flow route	Step reg.	Framework output
hono	250.7 KiB (±0)	93.0 KiB (±0)	1.88 MiB (-1.2 KiB)
nextjs-turbopack	257.2 KiB (±0)	426 B (±0)	897.3 KiB (-380 B)

About these numbers

Sizes are gzip; parentheses show the change against main.
Flow route and Step reg. gate this job, on raw bytes rather than the gzip shown, at max(2%, 50.0 KiB). Framework output is informational.

dfc43e6 · run

VaguelySerious · 2026-09-12T00:18:18Z

Closing: this work was moved onto the original PR #4117 as a follow-up commit, with the review notes posted there.

VaguelySerious requested a review from a team as a code owner September 12, 2026 00:03

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VaguelySerious closed this Sep 12, 2026

VaguelySerious deleted the peter/postgres-queue-error-metadata branch September 12, 2026 00:18

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[world-postgres] Preserve Error fields in Graphile Worker log metadata - #4138

[world-postgres] Preserve Error fields in Graphile Worker log metadata#4138
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🧪 E2E Test Results

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