Doesn't see existing cache and subsequently refuses to save

[wmertens]

I am checking if a cache exists in one job and if it's missing, creating it in another job in the same workflow.

This works once, but subsequent runs don't see that particular cache and they can't write to the new cache.

Interestingly, other caches in that same workflow are fine.

Here's where I check if the cache exists:

      - name: 'cache: qwik'
        id: cache-qwik
        uses: actions/cache/restore@v4
        with:
          lookup-only: true
          path: packages/qwik/dist
          key: ${{ hashfiles('pnpm-lock.yaml', 'packages/qwik/**/*') }}

and then later I write to it:

      - name: Save cache
        uses: actions/cache/save@v4
        with:
          path: packages/qwik/dist/
          key: ${{ needs.changes.outputs.hash-qwik }}

First it doesn't find the cache:

Run actions/cache/restore@v4
  with:
    lookup-only: true
    path: packages/qwik/dist
    key: c660bbff0b137960eb51b0c1eb[2](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650812414#step:6:2)f0afa6504525dfafc7ea[3](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650812414#step:6:3)31339e48dad5a593
    enableCrossOsArchive: false
    fail-on-cache-miss: false
  env:
    CARGO_INCREMENTAL: 0
Cache not found for input keys: c660bbff0b137960eb51b0c1eb2f0afa650[4](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650812414#step:6:4)525dfafc7ea331339e48dad5a[5](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650812414#step:6:5)93

The cache does exist for that branch, it was written in an earlier, cancelled workflow:

Run actions/cache/save@v4
  with:
    path: packages/qwik/dist/
    key: c660bbff0b137960eb51b0c1eb[2](https://github.com/QwikDev/qwik/actions/runs/8973344736/job/24643291601#step:8:2)f0afa6504525dfafc7ea[3](https://github.com/QwikDev/qwik/actions/runs/8973344736/job/24643291601#step:8:3)31339e48dad5a593
    enableCrossOsArchive: false
  env:
    CARGO_INCREMENTAL: 0
    PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin
    NPM_CONFIG_USERCONFIG: /home/runner/work/_temp/.npmrc
    NODE_AUTH_TOKEN: XXXXX-XXXXX-XXXXX-XXXXX
/usr/bin/tar --posix -cf cache.tzst --exclude cache.tzst -P -C /home/runner/work/qwik/qwik --files-from manifest.txt --use-compress-program zstdmt
Cache Size: ~5 MB (5517627 B)
Cache saved successfully
Cache saved with key: c660bbff0b137960eb51b0c1eb2f0afa650[4](https://github.com/QwikDev/qwik/actions/runs/8973344736/job/24643291601#step:8:4)525dfafc7ea331339e48dad5a593

and so predictably the save fails:

Run actions/cache/save@v4
  with:
    path: packages/qwik/dist/
    key: c660bbff0b137960eb51b0c1eb[2](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:2)f0afa6504525dfafc7ea[3](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:3)31339e48dad5a593
    enableCrossOsArchive: false
  env:
    CARGO_INCREMENTAL: 0
    PNPM_HOME: /home/runner/setup-pnpm/node_modules/.bin
    NPM_CONFIG_USERCONFIG: /home/runner/work/_temp/.npmrc
    NODE_AUTH_TOKEN: XXXXX-XXXXX-XXXXX-XXXXX
/usr/bin/tar --posix -cf cache.tzst --exclude cache.tzst -P -C /home/runner/work/qwik/qwik --files-from manifest.txt --use-compress-program zstdmt
Failed to save: Unable to reserve cache with key c660bbff0b137960eb51b0c1eb2f0afa650[4](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:4)525dfafc7ea331339e48dad5a593, another job may be creating this cache. More details: Cache already exists. Scope: refs/heads/build/v2-temp-deleteme, Key: c660bbff0b137960eb[5](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:5)1b0c1eb2f0afa6504525dfafc7ea331339e48dad5a593, Version: 97b2de491[6](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:6)3b9c6e6eb52d3c39[7](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:7)fb9d4ee5e1c5b0138854c7a22550bd66bb[8](https://github.com/QwikDev/qwik/actions/runs/8975670439/job/24650820938#step:8:8)50
Warning: Cache save failed.

What could be the reason for this?

[mark-jordanovic-lewis]

Similar issue: https://github.com/actions/cache/issues/1361

[wmertens]

Closing this in favor of #1361 which is the same issue