[auth][error] TypeError: fetch failed - Use My Public Repo to Reproduce the Issue Consistently

[nvijayap]

Environment

System:
OS: macOS 14.1.1
CPU: (8) arm64 Apple M1
Memory: 96.58 MB / 16.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 21.5.0 - /opt/homebrew/bin/node
Yarn: 1.22.19 - /opt/homebrew/bin/yarn
npm: 10.2.4 - /opt/homebrew/bin/npm
pnpm: 8.14.0 - ~/Library/pnpm/pnpm
Browsers:
Chrome: 121.0.6167.85
Safari: 17.1
npmPackages:
@auth/core: 0.20.0 => 0.20.0

Reproduction URL

https://github.com/nvijayap/auth_core_undici

Describe the issue

. Unable to signin
. Provider is Keycloak
. Did yarn build first and then tried
. Here's the stack trace ...

[auth][error] TypeError: fetch failed
    at node:internal/deps/undici/undici:12442:11
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async getAuthorizationUrl (file:///Users/nv/auth_core_undici/.output/server/node_modules/@auth/core/lib/actions/signin/authorization-url.js:18:35)
    at async Module.signIn (file:///Users/nv/auth_core_undici/.output/server/node_modules/@auth/core/lib/actions/signin/index.js:10:56)
    at async AuthInternal (file:///Users/nv/auth_core_undici/.output/server/node_modules/@auth/core/lib/index.js:58:24)
    at async Auth (file:///Users/nv/auth_core_undici/.output/server/node_modules/@auth/core/index.js:104:29)
    at async file:///Users/nv/auth_core_undici/.output/server/node_modules/@hattip/adapter-node/dist/chunk-H2MKLSMM.js:37:24
    at async Object.handler (file:///Users/nv/auth_core_undici/.output/server/chunks/nitro/node-server.mjs:2751:19)
    at async Server.toNodeHandle (file:///Users/nv/auth_core_undici/.output/server/chunks/nitro/node-server.mjs:2940:7)

NOTE: No issue when yarn run dev is used

How to reproduce

Steps to reproduce the issue ...

1. git clone https://github.com/nvijayap/auth_core_undici
2. cd auth_core_undici
3. Place the .env shown in README.md
4. ./run.sh
5. Visit http://localhost:3000 in browser
6. Try to Sign in

Expected behavior

The signin should be successful as in the case of yarn run dev

[SriniJ888]

I am facing the same exact issue.

In trying to eliminate tech stack dependencies, I did a matrix test with stable node versions and build tools, while staying on the same Nuxt/Vue/AuthCore versions.

I tried with node versions 21.5.0, 20.11.0, 18.19.0 (stable versions) as well as with yarn, npm, pnpm (pkg managers). In all cases, the dev mode works fine and the build mode failed, even on local mac. Easily reproducible by using the github link mentioned above.

This has been a show stopper to deploy my app to my cloud servers.
Any and all help will be greatly appreciated.

Thanks in advance for your help.

[nvijayap]

Issue resolved by setting env vars for the lines in .env

[aakash14goplani]

@nvijayap @SriniJ888 - can you please tell which env variables helped you resolve this issue?

[sum7k]

Replacing localhost by 127.0.0.1 in issuer in Keycloak options solved it for me. (auth.ts file).
#9819 (comment)

[yaredow]

Issue resolved by setting env vars for the lines in .env

What does this even mean?