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Avoid MaxListeners warning on dev startup with content collections#15884

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matthewp merged 1 commit intomainfrom
listener-warning
Mar 12, 2026
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Avoid MaxListeners warning on dev startup with content collections#15884
matthewp merged 1 commit intomainfrom
listener-warning

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@matthewp matthewp commented Mar 12, 2026

Changes

Testing

  • Add a unit regression test that verifies the watcher max listener value is increased during content listener attachment.

Docs

  • No docs update needed; this is an internal dev-server warning fix with no user-facing API changes.

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changeset-bot bot commented Mar 12, 2026

🦋 Changeset detected

Latest commit: 4ff5687

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

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@github-actions github-actions bot added the pkg: astro Related to the core `astro` package (scope) label Mar 12, 2026
@matthewp matthewp changed the title fix(astro): avoid MaxListeners warning on dev startup Avoid MaxListeners warning on dev startup with content collections Mar 12, 2026
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codspeed-hq bot commented Mar 12, 2026

Merging this PR will not alter performance

✅ 18 untouched benchmarks


Comparing listener-warning (4ff5687) with main (f47ac53)1

Open in CodSpeed

Footnotes

  1. No successful run was found on main (b16ee32) during the generation of this report, so f47ac53 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.

@matthewp matthewp marked this pull request as ready for review March 12, 2026 17:03
@matthewp matthewp merged commit dcd2c8e into main Mar 12, 2026
43 of 44 checks passed
@matthewp matthewp deleted the listener-warning branch March 12, 2026 17:51
@astrobot-houston astrobot-houston mentioned this pull request Mar 12, 2026
dadezzz pushed a commit to dadezzz/ice-notes that referenced this pull request Mar 20, 2026
This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [@astrojs/check](https://github.com/withastro/astro/tree/main/packages/language-tools/astro-check) ([source](https://github.com/withastro/astro/tree/HEAD/packages/language-tools/astro-check)) | [`0.9.7` → `0.9.8`](https://renovatebot.com/diffs/npm/@astrojs%2fcheck/0.9.7/0.9.8) | ![age](https://developer.mend.io/api/mc/badges/age/npm/@astrojs%2fcheck/0.9.8?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@astrojs%2fcheck/0.9.7/0.9.8?slim=true) |
| [astro](https://astro.build) ([source](https://github.com/withastro/astro/tree/HEAD/packages/astro)) | [`6.0.4` → `6.0.5`](https://renovatebot.com/diffs/npm/astro/6.0.4/6.0.5) | ![age](https://developer.mend.io/api/mc/badges/age/npm/astro/6.0.5?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/6.0.4/6.0.5?slim=true) |

---

### Release Notes

<details>
<summary>withastro/astro (@&#8203;astrojs/check)</summary>

### [`v0.9.8`](https://github.com/withastro/astro/blob/HEAD/packages/language-tools/astro-check/CHANGELOG.md#098)

[Compare Source](https://github.com/withastro/astro/compare/@astrojs/check@0.9.7...@astrojs/check@0.9.8)

##### Patch Changes

- [#&#8203;15892](withastro/astro#15892) [`a2f597d`](withastro/astro@a2f597d) Thanks [@&#8203;Princesseuh](https://github.com/Princesseuh)! - Fixes Astro not being able to find astro check sometimes

- Updated dependencies \[[`7b4b254`](withastro/astro@7b4b254)]:
  - [@&#8203;astrojs/language-server](https://github.com/astrojs/language-server)@&#8203;2.16.5

</details>

<details>
<summary>withastro/astro (astro)</summary>

### [`v6.0.5`](https://github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#605)

[Compare Source](https://github.com/withastro/astro/compare/astro@6.0.4...astro@6.0.5)

##### Patch Changes

- [#&#8203;15891](withastro/astro#15891) [`b889231`](withastro/astro@b889231) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix dev routing for `server:defer` islands when adapters opt into handling prerendered routes in Astro core. Server island requests are now treated as prerender-handler eligible so prerendered pages using `prerenderEnvironment: 'node'` can load island content without `400` errors.

- [#&#8203;15890](withastro/astro#15890) [`765a887`](withastro/astro@765a887) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fixes `astro:actions` validation to check resolved routes, so projects using default static output with at least one `prerender = false` page or endpoint no longer fail during startup.

- [#&#8203;15884](withastro/astro#15884) [`dcd2c8e`](withastro/astro@dcd2c8e) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Avoid a `MaxListenersExceededWarning` during `astro dev` startup by increasing the shared Vite watcher listener limit when attaching content server listeners.

- [#&#8203;15904](withastro/astro#15904) [`23d5244`](withastro/astro@23d5244) Thanks [@&#8203;jlukic](https://github.com/jlukic)! - Emit the `before-hydration` script chunk for the `client` Vite environment. The chunk was only emitted for `prerender` and `ssr` environments, causing a 404 when browsers tried to load it. This broke hydration for any integration using `injectScript('before-hydration', ...)`, including Lit SSR.

- [#&#8203;15933](withastro/astro#15933) [`325901e`](withastro/astro@325901e) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Fixes an issue where `<style>` tags inside SVG components weren't correctly tracked when enabling CSP.

- [#&#8203;15875](withastro/astro#15875) [`c43ef8a`](withastro/astro@c43ef8a) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Ensure custom prerenderers are always torn down during build, even when `getStaticPaths()` throws.

- [#&#8203;15887](withastro/astro#15887) [`1861fed`](withastro/astro@1861fed) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Fixes an issue where the build incorrectly leaked server entrypoint into the client environment, causing adapters to emit warnings during the build.

- [#&#8203;15888](withastro/astro#15888) [`925252e`](withastro/astro@925252e) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix a bug where `server:defer` could fail at runtime in prerendered pages for some adapters (including Cloudflare), causing errors like `serverIslandMap?.get is not a function`.

- [#&#8203;15901](withastro/astro#15901) [`07c1002`](withastro/astro@07c1002) Thanks [@&#8203;delucis](https://github.com/delucis)! - Fixes JSON schema generation for content collection schemas that have differences between their input and output shapes.

- [#&#8203;15882](withastro/astro#15882) [`759f946`](withastro/astro@759f946) Thanks [@&#8203;matthewp](https://github.com/matthewp)! - Fix `Astro.url.pathname` for the root page when using `build.format: "file"` so it resolves to `/index.html` instead of `/.html` during builds.

</details>

---

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👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired.

---

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---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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MaxListenersExceeded warning on dev server startup (Astro 6.x)

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