Using python-coveralls from github-actions returns "Could not submit coverage: 422 Client Error"

Question

Coveralls python wrapper (python-coveralls) recently received a major update (2.2.0 -> 3.0.0) and my github-actions workflow is no longer running.

This is the relevant part of my workflow:

  test:
    runs-on: ubuntu-latest
    steps:
    {... non-relevant steps...}
    - name: Run test suite
      run: tox -e $(echo py${{ matrix.python-version }}-mg${{ matrix.PYMONGO }} | tr -d . | sed -e 's/pypypy/pypy/') -- -a "--cov=my_project"
    - name: Send coverage to Coveralls
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: coveralls

This used to work with previous version of python-coveralls, so the tox command is not the problem

This is the error I receive:

Submitting coverage to coveralls.io...
Could not submit coverage: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs
resubmitting with id None-158455276967659442
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.7.9/x64/lib/python3.7/site-packages/coveralls/api.py", line 252, in wear
    response.raise_for_status()
  File "/opt/hostedtoolcache/Python/3.7.9/x64/lib/python3.7/site-packages/requests/models.py", line 943, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.7.9/x64/lib/python3.7/site-packages/coveralls/cli.py", line 85, in main
    result = coverallz.wear()
  File "/opt/hostedtoolcache/Python/3.7.9/x64/lib/python3.7/site-packages/coveralls/api.py", line 255, in wear
    raise CoverallsException('Could not submit coverage: {}'.format(e))
coveralls.exception.CoverallsException: Could not submit coverage: 422 Client Error: Unprocessable Entity for url: https://coveralls.io/api/v1/jobs

Answer 1

You could try adding the service name as state in the release notes and mentioned here: https://github.com/coveralls-clients/coveralls-python/issues/251

run: coveralls --service=github