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(v.0.42) Error - Invariant Violation: Failed to respond request: the "request" event has already been responded to

See original GitHub issue

Prerequisites

I confirm my issue is not in the opened issues
I confirm the Frequently Asked Questions didn’t contain the answer to my issue

Environment check

I’m using the latest msw version
I’m using Node.js version 14 or higher

Node.js version

v16.15.0

Reproduction repository

https://github.com/7iomka/next-with-msw-and-effector

Reproduction steps

yarn add msw@latest yarn dev

Current behavior

error - Invariant Violation: Failed to respond to "GET http://localhost:3000/backend-api/xxxx" request: the "request" event has already been responded to.
    at setupServerListener (************/node_modules/msw/lib/node/index.js:1249:17) {

Expected behavior

All works as in v0.38.0

Issue Analytics

State:
Created a year ago
Reactions:9
Comments:25 (12 by maintainers)

Top GitHub Comments

9reactions

kettanaitocommented, Jun 22, 2022

Hey, my pleasure, @M3kH! I’m happy we were able to find a solution that’s not entirely hacky. HMR is tricky, and it depends on the module evaluation, so certain modules are “preserved” while certain are re-evaluated. Funny how moving a class instantiation into a different module affects how that class will behave when under hot reload. If anything, the hot reload itself feels magical (perhaps too magical?).

That being said, if you like my work and would like for MSW to grow and improve, please consider sponsoring the project on GitHub. Let’s build sustainable open source together, where features and bug fixes don’t cost maintainer’s personal lives and time.

3reactions

MathieuDoyoncommented, Jun 14, 2022

I’m getting it with https://github.com/vercel/next.js/tree/canary/examples/with-msw just by upgrading dependency to "msw": "^0.42.1",

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