action does not cache on runner or cache server

[phk-nord]

Description:
We have a self hosted runner (ARC Runner Scale Set) and self hosted actions cache both running in k8s. The action won't cache yarn on either the runner or the cache server

Action version:

• setup-node@v4

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

installed on runner image via nvm:

• yarn 1.22.22
• npm 10.8.2
• node v22.7.0

action uses:

• node v20.18.0

Repro steps:
A description with steps to reproduce the issue. If you have a public example or repo to share, please provide the link.

Expected behavior:
A description of what you expected to happen.
action caches yarn on the cache server

Actual behavior:
A description of what is actually happening.
yarn will not be cached.

Action output of the action step

Run actions/setup-node@v4
  with:
    node-version: [2](https://github.com/nordeck/matrix-neoboard-standalone/actions/runs/11589506017/job/32389313057#step:4:2)0
    cache: yarn
    cache-dependency-path: matrix-neoboard-standalone/yarn.lock
  matrix-neoboard/yarn.lock
  
    always-auth: false
    check-latest: false
    token: ***
  env:
    ARGOCD_SHA: 
    DOCKER_IMAGE: ghcr.io/nordeck/matrix-neoboard-standalone
    REACT_APP_REACT_SDK_VERSION: unset
    REACT_APP_REACT_SDK_REVISION: unset
Found in cache @ /home/runner/_work/_tool/node/20.18.0/x6[4](https://github.com/nordeck/matrix-neoboard-standalone/actions/runs/11589506017/job/32389313057#step:4:4)
Environment details
  node: v20.18.0
  npm: 10.8.2
  yarn: 1.22.22
/home/runner/.nvm/versions/node/v22.7.0/bin/yarn --version
/home/runner/.nvm/versions/node/v22.7.0/bin/yarn --version
1.22.22
/home/runner/.nvm/versions/node/v22.7.0/bin/yarn cache dir
1.22.22
/home/runner/.nvm/versions/node/v22.7.0/bin/yarn cache dir
/home/runner/.cache/yarn/v[6](https://github.com/nordeck/matrix-neoboard-standalone/actions/runs/11589506017/job/32389313057#step:4:6)
/home/runner/.cache/yarn/v6
/home/runner/.nvm/versions/node/v22.[7](https://github.com/nordeck/matrix-neoboard-standalone/actions/runs/11589506017/job/32389313057#step:4:7).0/bin/yarn config get enableGlobalCache
/home/runner/.nvm/versions/node/v22.7.0/bin/yarn config get enableGlobalCache
undefined
undefined
yarn cache is not found

[mahabaleshwars]

Hello @phk-nord,
Thank you for creating this issue. We will investigate it and provide feedback as soon as we have some updates.

[mahabaleshwars]

Hello @phk-nord,

Could you please share a repro link or detailed steps to reproduce the issue? I reviewed the output you provided and noticed that the action is using Node v20.18.0 while Yarn is being checked in Node v22.7.0. The command yarn cache dir is returning undefined, which suggests that the Yarn cache directory is not set or found. This typically indicates a misconfiguration or that the environment setup is incomplete, causing Yarn to be unable to locate the cache directory.