chore(module-federation): skip webpack-based e2e tests pending webpack 5.107.0 compat by FrozenPandaz · Pull Request #35753 · nrwl/nx

FrozenPandaz · 2026-05-20T17:41:01Z

Current Behavior

All webpack-based React Module Federation e2e tests started failing on 2026-05-20.

Webpack 5.107.0 (published earlier today) reorganized its internal lib/ directory into subdirectories — e.g. lib/ModuleNotFoundError.js moved to lib/errors/ModuleNotFoundError.js, lib/DllPlugin.js moved to lib/dll/DllPlugin.js, etc. @module-federation/enhanced (which our generators wire up for webpack-based host/remote apps) deep-imports require('webpack/lib/ModuleNotFoundError'), which now throws MODULE_NOT_FOUND and aborts every webpack-based MF build/serve in our react e2e suite.

Sample failure:

NX   Cannot find module 'webpack/lib/ModuleNotFoundError'
Require stack:
- node_modules/@module-federation/enhanced/dist/src/lib/sharing/resolveMatchedConfigs.js
- node_modules/@module-federation/enhanced/dist/src/lib/sharing/ConsumeSharedPlugin.js
- ...
- node_modules/@nx/module-federation/src/with-module-federation/webpack/with-module-federation.js

This is upstream's bug, not ours:

Getting ModuleNotFoundError webpack/webpack#20985 — closed by webpack maintainer pointing at module-federation
Avoid using internal webpack API module-federation/core#4747 — open issue for module-federation to stop using private webpack APIs
fix: re-export ModuleNotFoundError from lib/ModuleNotFoundError webpack/webpack#20988 — adds back a lib/ModuleNotFoundError compat shim (merged, awaiting a webpack patch release)

Even after the shim release lands, other deep imports may still be broken, so we want to fully decouple our CI from this until both ecosystems re-sync.

Angular MF goes through the same @module-federation/enhanced/webpack code path and would theoretically fail too, but only react tests were observed failing in CI. The angular suites are left enabled so we get a real signal if/when they hit the same issue.

Expected Behavior

CI passes. Webpack-based react MF e2e suites are temporarily skipped with describe.skip and a TODO comment linking the upstream tracking issues. Rspack-based MF e2e tests and angular MF e2e tests are untouched and continue to run.

Skipped suites:

e2e/react/src/module-federation/core-webpack-basic-host-remote-generation.test.ts
e2e/react/src/module-federation/core-webpack-basic-playwright.test.ts
e2e/react/src/module-federation/core-webpack-name-and-root.test.ts
e2e/react/src/module-federation/core-webpack-query-params.test.ts
e2e/react/src/module-federation/core-webpack-ssr.test.ts
e2e/react/src/module-federation/dynamic-federation.webpack.test.ts
e2e/react/src/module-federation/federate-module.webpack.test.ts
e2e/react/src/module-federation/independent-deployability.webpack.test.ts
e2e/react/src/module-federation/misc-rspack-interoperability.test.ts (both scenarios still build with webpack on one side)

Related Issue(s)

Tracking upstream:

…k 5.107.0 compatibility webpack 5.107.0 (published 2026-05-20) reorganized lib/ into subdirectories, breaking deep imports like require('webpack/lib/ModuleNotFoundError') used by @module-federation/enhanced. Skip the affected e2e tests until upstream is fixed. Refs: - webpack/webpack#20985 - module-federation/core#4747

netlify · 2026-05-20T17:41:07Z

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nx-cloud · 2026-05-20T17:41:28Z

View your CI Pipeline Execution ↗ for commit c663378

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☁️ Nx Cloud last updated this comment at 2026-05-20 21:08:01 UTC

…s confirmed failing Reverts the angular portion of the previous commit. Angular MF goes through the same @module-federation/enhanced/webpack code path as react and would theoretically fail too, but only react tests were observed failing in CI. Keeping the angular suites enabled so we get a real signal if/when they hit the same issue.

Co-authored-by: FrozenPandaz <FrozenPandaz@users.noreply.github.com>

nx-cloud

Nx Cloud has identified a flaky task in your failed CI:

🔂 Since the failure was identified as flaky, we triggered a CI rerun by adding an empty commit to this branch.

View detailed reasoning in Nx Cloud ↗

_{🎓 Learn more about Self-Healing CI on nx.dev}

…bpack 5.107.1 fix is live) (#35764) ## Current Behavior PR #35753 skipped 9 webpack-based React Module Federation e2e suites because webpack 5.107.0 (published 2026-05-20) reorganized its `lib/` directory and removed `lib/ModuleNotFoundError.js`, which `@module-federation/enhanced` deep-imports. Every webpack-based MF build/serve in the affected suites was failing with `Cannot find module 'webpack/lib/ModuleNotFoundError'`. ## Expected Behavior webpack 5.107.1 (published 2026-05-21) restored the path as a backward-compat shim — `lib/ModuleNotFoundError.js` now re-exports from `./errors/ModuleNotFoundError`. Verified locally that all 21 `webpack/lib/*` paths used by `@module-federation/enhanced` 2.4.0 / 2.5.0 now resolve in 5.107.1. This PR removes the `describe.skip` + TODO + `// eslint-disable-next-line jest/no-disabled-tests` lines from the 9 affected files, re-enabling: - `e2e/react/src/module-federation/core-webpack-basic-host-remote-generation.test.ts` - `e2e/react/src/module-federation/core-webpack-basic-playwright.test.ts` - `e2e/react/src/module-federation/core-webpack-name-and-root.test.ts` - `e2e/react/src/module-federation/core-webpack-query-params.test.ts` - `e2e/react/src/module-federation/core-webpack-ssr.test.ts` - `e2e/react/src/module-federation/dynamic-federation.webpack.test.ts` - `e2e/react/src/module-federation/federate-module.webpack.test.ts` - `e2e/react/src/module-federation/independent-deployability.webpack.test.ts` - `e2e/react/src/module-federation/misc-rspack-interoperability.test.ts` ## Related Issue(s) Reverts the skip from #35753. Upstream: - webpack/webpack#20988 (compat shim, merged) - webpack/webpack#20989 (webpack 5.107.1 release, merged)

…k 5.107.0 compat (#35753) ## Current Behavior All webpack-based React Module Federation e2e tests started failing on 2026-05-20. Webpack 5.107.0 (published earlier today) reorganized its internal `lib/` directory into subdirectories — e.g. `lib/ModuleNotFoundError.js` moved to `lib/errors/ModuleNotFoundError.js`, `lib/DllPlugin.js` moved to `lib/dll/DllPlugin.js`, etc. `@module-federation/enhanced` (which our generators wire up for webpack-based host/remote apps) deep-imports `require('webpack/lib/ModuleNotFoundError')`, which now throws `MODULE_NOT_FOUND` and aborts every webpack-based MF build/serve in our react e2e suite. Sample failure: ``` NX Cannot find module 'webpack/lib/ModuleNotFoundError' Require stack: - node_modules/@module-federation/enhanced/dist/src/lib/sharing/resolveMatchedConfigs.js - node_modules/@module-federation/enhanced/dist/src/lib/sharing/ConsumeSharedPlugin.js - ... - node_modules/@nx/module-federation/src/with-module-federation/webpack/with-module-federation.js ``` This is upstream's bug, not ours: - webpack/webpack#20985 — closed by webpack maintainer pointing at module-federation - module-federation/core#4747 — open issue for module-federation to stop using private webpack APIs - webpack/webpack#20988 — adds back a `lib/ModuleNotFoundError` compat shim (merged, awaiting a webpack patch release) Even after the shim release lands, other deep imports may still be broken, so we want to fully decouple our CI from this until both ecosystems re-sync. Angular MF goes through the same `@module-federation/enhanced/webpack` code path and would theoretically fail too, but only react tests were observed failing in CI. The angular suites are left enabled so we get a real signal if/when they hit the same issue. ## Expected Behavior CI passes. Webpack-based react MF e2e suites are temporarily skipped with `describe.skip` and a TODO comment linking the upstream tracking issues. Rspack-based MF e2e tests and angular MF e2e tests are untouched and continue to run. Skipped suites: - `e2e/react/src/module-federation/core-webpack-basic-host-remote-generation.test.ts` - `e2e/react/src/module-federation/core-webpack-basic-playwright.test.ts` - `e2e/react/src/module-federation/core-webpack-name-and-root.test.ts` - `e2e/react/src/module-federation/core-webpack-query-params.test.ts` - `e2e/react/src/module-federation/core-webpack-ssr.test.ts` - `e2e/react/src/module-federation/dynamic-federation.webpack.test.ts` - `e2e/react/src/module-federation/federate-module.webpack.test.ts` - `e2e/react/src/module-federation/independent-deployability.webpack.test.ts` - `e2e/react/src/module-federation/misc-rspack-interoperability.test.ts` (both scenarios still build with webpack on one side) ## Related Issue(s) Tracking upstream: - webpack/webpack#20985 - module-federation/core#4747 - webpack/webpack#20988 --------- Co-authored-by: nx-cloud[bot] <71083854+nx-cloud[bot]@users.noreply.github.com> Co-authored-by: FrozenPandaz <FrozenPandaz@users.noreply.github.com> (cherry picked from commit a51e340)

…bpack 5.107.1 fix is live) (#35764) ## Current Behavior PR #35753 skipped 9 webpack-based React Module Federation e2e suites because webpack 5.107.0 (published 2026-05-20) reorganized its `lib/` directory and removed `lib/ModuleNotFoundError.js`, which `@module-federation/enhanced` deep-imports. Every webpack-based MF build/serve in the affected suites was failing with `Cannot find module 'webpack/lib/ModuleNotFoundError'`. ## Expected Behavior webpack 5.107.1 (published 2026-05-21) restored the path as a backward-compat shim — `lib/ModuleNotFoundError.js` now re-exports from `./errors/ModuleNotFoundError`. Verified locally that all 21 `webpack/lib/*` paths used by `@module-federation/enhanced` 2.4.0 / 2.5.0 now resolve in 5.107.1. This PR removes the `describe.skip` + TODO + `// eslint-disable-next-line jest/no-disabled-tests` lines from the 9 affected files, re-enabling: - `e2e/react/src/module-federation/core-webpack-basic-host-remote-generation.test.ts` - `e2e/react/src/module-federation/core-webpack-basic-playwright.test.ts` - `e2e/react/src/module-federation/core-webpack-name-and-root.test.ts` - `e2e/react/src/module-federation/core-webpack-query-params.test.ts` - `e2e/react/src/module-federation/core-webpack-ssr.test.ts` - `e2e/react/src/module-federation/dynamic-federation.webpack.test.ts` - `e2e/react/src/module-federation/federate-module.webpack.test.ts` - `e2e/react/src/module-federation/independent-deployability.webpack.test.ts` - `e2e/react/src/module-federation/misc-rspack-interoperability.test.ts` ## Related Issue(s) Reverts the skip from #35753. Upstream: - webpack/webpack#20988 (compat shim, merged) - webpack/webpack#20989 (webpack 5.107.1 release, merged) (cherry picked from commit b6858ba)

github-actions · 2026-05-26T00:32:36Z

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.

FrozenPandaz requested a review from a team as a code owner May 20, 2026 17:41

FrozenPandaz requested a review from lourw May 20, 2026 17:41

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chore(tests): suppress jest/no-disabled-tests

c663378

Co-authored-by: FrozenPandaz <FrozenPandaz@users.noreply.github.com>

AgentEnder approved these changes May 20, 2026

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FrozenPandaz enabled auto-merge (squash) May 20, 2026 19:14

FrozenPandaz merged commit a51e340 into master May 20, 2026
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FrozenPandaz deleted the fix-module-federation branch May 20, 2026 21:09

FrozenPandaz mentioned this pull request May 21, 2026

chore(module-federation): re-enable webpack-based react e2e tests (webpack 5.107.1 fix is live) #35764

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chore(module-federation): skip webpack-based e2e tests pending webpack 5.107.0 compat#35753

chore(module-federation): skip webpack-based e2e tests pending webpack 5.107.0 compat#35753
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