[vitest-pool-workers] Ignore workerd's ungraceful TLS disconnect exception logs

[mishushakov]

Fixes #14820.

When tests make real fetch() calls to external HTTPS endpoints, servers and load balancers routinely close idle keepalive connections without sending a TLS close_notify. No request fails — the connection is idle, and undici/Bun/Deno silently discard the same event — but workerd logs a kj/compat/tls.c++:429: disconnected: peer disconnected without gracefully ending TLS session exception with a full unsymbolized stack trace each time, flooding otherwise green runs (real-world example: 10+ occurrences in a passing 393-test suite).

Since the pool installs its own handleStructuredLogs and users can't override Miniflare's log handling from the vitest config, the only place to filter this is the pool's ignoreMessages list — which already suppresses the equivalent non-TLS shapes (disconnected: operation canceled, disconnected: WebSocket peer disconnected, …) as "normal operation". This PR adds the TLS variant to the same list, plus a changeset.

Note on the accompanying stack: line: workerd's JsonLogger::logMessage emits one JSON log entry per kj log call, and kj's exception stringifier includes \nstack: … in the same string, so the exception text and its stack trace arrive as a single structured message — the substring match filters both together, same as the existing disconnected: … entries.

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows: verified the exact message captured from the CI log above matches the new ignoreMessages entry via the existing .includes() filter (and that unrelated warnings/exception shapes don't); ran the E2B SDK's full 393-test workerd suite against a locally patched pool dist — all green with no change in other output. The TLS disconnect event itself is environment-dependent (triggered reliably on GitHub Actions runners, not on a local network), so an end-to-end assertion isn't practical.
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: no user-facing behavior change beyond removing non-actionable log noise.

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[changeset-bot]

🦋 Changeset detected

Latest commit: adc9090

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

This PR includes changesets to release 1 package

Name	Type
@cloudflare/vitest-pool-workers	Patch

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

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@cloudflare/autoconfig

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@cloudflare/config

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create-cloudflare

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@cloudflare/deploy-helpers

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@cloudflare/kv-asset-handler

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@cloudflare/unenv-preset

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@cloudflare/vitest-pool-workers

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commit: adc9090

[dario-piotrowicz]

Looks good to me! Thanks for the fix @mishushakov! 🫶

(Also I hope this extra log hasn't been too annoying for you, sorry about that 🥹)

I'm merging your PR right away, the fix should be out with the next vitest-pool-workers package release on Tuesday 🙂

[workers-devprod]

Codeowners reviews satisfied