Restore Cache - Error validating cache

Build Environment
1

I have a project that saves and restores 2 caches. 1 of them works as expected while the other reports:

Error validating cache: Error listing tarball /tmp/cache632340460: exit status 2

Both caches are located within $HOME and I’m not really sure why one would work while the other would fail. What information would be useful in figuring this out? My project uses a machine executor rather than docker, for what it’s worth, and the data being cached/restored for both caches are coming from/going to directories mounted as volumes in docker.

2

Hi @moorecp, welcome to the CircleCI Discuss community! Without looking at your build, here are a few things I can think of:

Usually, the save_cache function skips when the same cache-key already stored. If your workflow is using parallelism, It’s better to separate the cache step to another job to avoid this.

If you are using docker-compose with the machine executor, the vendor folder has root permissions. Since the user of machine executor is a CircleCI user, could you try changing it to the root owner and see if you continue to experience this error?

3

I’m experiencing the same issue. Below is the example to reproduce, in which I used docker-compose to build serverless image.

jobs:
  deploy:
    machine:
      docker_layer_caching: true
      user: root
    steps:
      - checkout
      - run: docker-compose build
      - restore_cache:
          keys:
            - serverless-python-requirements-v1-{{ checksum "requirements.txt" }}
      - run: |
          docker-compose run --rm \
            -e STAGE=${STAGE} \
            serverless bash -c "yarn --frozen-lockfile && yarn sls deploy --stage ${STAGE}"
      - save_cache:
          paths:
            - .serverless-python-requirements-cache
          key: serverless-python-requirements-v1-{{ checksum "requirements.txt" }}

CI run gives the following error:

Restoring Cache
Found a cache at serverless-python-requirements-v3-xxx
Size: 335 B
Cached paths:
  * /home/circleci/project/.serverless-python-requirements-cache

Downloading cache archive...
Validating cache...
Found a cache at serverless-python-requirements-v3-xxx
Size: 335 B
Cached paths:
  * /home/circleci/project/.serverless-python-requirements-cache

Downloading cache archive...
Validating cache...
Found a cache at serverless-python-requirements-v3-xxx
Size: 335 B
Cached paths:
  * /home/circleci/project/.serverless-python-requirements-cache

Downloading cache archive...
Validating cache...

Error validating cache: Error listing tarball /tmp/cache259776929: exit status 2