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fix(nextjs): Don't abort Cache Components renders on Cloudflare Workers when requests overlap - #25315

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@chargome chargome commented Oct 13, 2026 •

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What

The SDK's safe ID generation now exits the Next.js work-unit storage that Next.js 16.4 and newer register on globalThis, and only falls back to an AsyncLocalStorage snapshot on older versions. @sentry/core no longer caches a missing runner, so a runner registered after the first random value is picked up. Adds an optional OpenNext e2e variant for the Cache Components app with a spec for overlapping runtime prefetches.

Why

On Cloudflare Workers, overlapping Cache Components requests ended with one of them aborted and a ~ body. workerd binds snapshots to the request that took them, so the SDK re-snapshotted inside another request's prerender and tripped the Next.js sync-IO guard. The Worker also holds a second copy of core via withSentry that generated its first ID before Next.js was loaded and never saw the runner.

The e2e variant is optional because released OpenNext does not run Cache Components renders on workerd yet (opennextjs/opennextjs-cloudflare#1318). Verified locally against their preview build of that PR.

Fixes #25245

…rs when requests overlap

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
@chargome chargome self-assigned this Oct 13, 2026
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JS-3906

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size-limit report 📦

Compared: b3082dc (PR test merge using develop at aaef171)

Against: aaef171 (develop) · base run #63905

✅ Baseline matches: this diff contains only this PR's changes.

Path Size % Change Change
@sentry/browser 30.32 kB -0.06% -17 B 🔽
@sentry/browser - with treeshaking flags 28.42 kB -0.09% -23 B 🔽
@sentry/browser - with treeshaking flags tracing without tracing 28.32 kB -0.08% -21 B 🔽
@sentry/browser (incl. Tracing) 52.58 kB -0.03% -15 B 🔽
@sentry/browser (incl. Tracing + Span Streaming) 52.59 kB -0.03% -15 B 🔽
@sentry/browser (incl. Tracing, Profiling) 55.52 kB -0.03% -15 B 🔽
@sentry/browser (incl. Tracing, Replay) 92.79 kB -0.02% -15 B 🔽
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.4 kB -0.03% -17 B 🔽
@sentry/browser (incl. Tracing, Replay with Canvas) 97.52 kB -0.02% -15 B 🔽
@sentry/browser (incl. Tracing, Replay, Feedback) 110.49 kB -0.02% -17 B 🔽
@sentry/browser (incl. Feedback) 47.87 kB -0.04% -18 B 🔽
@sentry/browser (incl. sendFeedback) 35.38 kB -0.06% -19 B 🔽
@sentry/browser (incl. FeedbackAsync) 40.49 kB -0.05% -19 B 🔽
@sentry/browser (incl. Metrics) 31.32 kB -0.06% -17 B 🔽
@sentry/browser (incl. Logs) 31.61 kB -0.06% -17 B 🔽
@sentry/browser (incl. Metrics & Logs) 32.28 kB -0.07% -21 B 🔽
@sentry/react 32.13 kB -0.06% -17 B 🔽
@sentry/react (incl. Tracing) 54.87 kB -0.04% -17 B 🔽
@sentry/vue 38.58 kB -0.04% -15 B 🔽
@sentry/vue (incl. Tracing) 55.48 kB -0.03% -14 B 🔽
@sentry/svelte 30.34 kB -0.06% -18 B 🔽
@sentry/remix (Remix 3 client bundle) 57.63 kB -0.03% -15 B 🔽
CDN Bundle 32.04 kB -0.07% -21 B 🔽
CDN Bundle (incl. Tracing) 53.07 kB -0.04% -19 B 🔽
CDN Bundle (incl. Logs, Metrics) 34.25 kB -0.06% -18 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics) 55.02 kB -0.04% -17 B 🔽
CDN Bundle (incl. Replay, Logs, Metrics) 75.66 kB -0.03% -18 B 🔽
CDN Bundle (incl. Tracing, Replay) 91.2 kB -0.03% -20 B 🔽
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 93.14 kB -0.02% -18 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) 97.34 kB -0.02% -19 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 99.31 kB -0.03% -20 B 🔽
CDN Bundle - uncompressed 94.25 kB -0.05% -40 B 🔽
CDN Bundle (incl. Tracing) - uncompressed 157.25 kB -0.03% -40 B 🔽
CDN Bundle (incl. Logs, Metrics) - uncompressed 100.8 kB -0.04% -40 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.22 kB -0.03% -40 B 🔽
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 232.3 kB -0.02% -40 B 🔽
CDN Bundle (incl. Tracing, Replay) - uncompressed 278.88 kB -0.02% -40 B 🔽
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 284.83 kB -0.02% -40 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 292.58 kB -0.02% -40 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 298.52 kB -0.02% -40 B 🔽
@sentry/nextjs (client) 57.72 kB -0.04% -19 B 🔽
@sentry/sveltekit (client) 53.04 kB -0.03% -14 B 🔽
@sentry/core/server 43.83 kB -0.03% -13 B 🔽
@sentry/core/browser 13.93 kB -0.1% -13 B 🔽
@sentry/node 154.56 kB -0.01% -3 B 🔽
@sentry/node/import (ESM hook with diagnostics-channel injection) 81.61 kB -0.02% -9 B 🔽
@sentry/node - without tracing 95.68 kB -0.01% -5 B 🔽
@sentry/node - without channel injection 135.2 kB -0.01% -5 B 🔽
@sentry/aws-serverless 103.85 kB -0.01% -4 B 🔽
@sentry/cloudflare (withSentry) - minified 197.73 kB -0.03% -42 B 🔽
@sentry/cloudflare (withSentry) 491.42 kB -0.02% -88 B 🔽
@sentry/nextjs/cloudflare (withSentry) - minified 218.31 kB -0.02% -42 B 🔽

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✅ Bugbot reviewed your changes and found no new issues!

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Reviewed by Cursor Bugbot for commit 51650f3. Configure here.

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Optional E2E tests

Some optional checks were not successful. They do not block the merge. 6 not successful, 60 successful. See the run.

Check Status
❌ CI: Optional E2E Tests / E2E cloudflare-workers-send-to-sentry Test (optional) Failing after 4m Details
❌ CI: Optional E2E Tests / E2E node-anthropic-send-to-sentry (latest) Test (optional) Failing after 38s Details
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❌ CI: Optional E2E Tests / E2E node-openai-decisions-send-to-sentry (latest) Test (optional) Failing after 3m Details
❌ CI: Optional E2E Tests / E2E nextjs-16-cacheComponents (cloudflare) Test (optional) Failing after 7m Details
Successful checks
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✅ CI: Optional E2E Tests / E2E angular (canary) Test (optional) Successful in 1m Details
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…e Components E2E app

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

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@sentry/nextjs aborts Next.js Cache Components renders on Cloudflare Workers when requests overlap

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