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500 Internal Server Error when uploading a PyPI package

Summary

I'm unable to upload certain packages to the project pypi package registry. Uploading the package results in a "500: Internal Server Error".

Steps to reproduce

I create a project on gitlab.com to illustrate this. To reproduce run following commands.

export TWINE_USERNAME=pypi
export TWINE_PASSWORD=hpGTaYCLEeeb_2Zx3tgm
export TWINE_REPOSITORY_URL=https://gitlab.com/api/v4/projects/20753229/packages/pypi
wget https://files.pythonhosted.org/packages/4e/97/494524c239e78ac45511f54f4fe64f610e4041e79a12500dc20303d9338a/lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
twine upload lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl

Example Project

https://gitlab.com/hesstobi/pypi-issue

What is the current bug behavior?

The package is not uploaded with an 500 Error.

What is the expected correct behavior?

The package should be uploaded to the project package registry.

Relevant logs and/or screenshots

The output of the commands above running in `docker run -it --rm python:3.8 bash` 


$ twine upload lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
Uploading distributions to https://gitlab.com/api/v4/projects/20753229/packages/pypi
Uploading lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6.98M/6.98M [00:02<00:00, 3.17MB/s]
Received "500: Internal Server Error" Package upload appears to have failed.  Retry 1 of 5
Uploading lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6.98M/6.98M [00:02<00:00, 2.77MB/s]
Received "500: Internal Server Error" Package upload appears to have failed.  Retry 2 of 5
Uploading lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6.98M/6.98M [00:02<00:00, 2.98MB/s]
Received "500: Internal Server Error" Package upload appears to have failed.  Retry 3 of 5
Uploading lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6.98M/6.98M [00:02<00:00, 3.13MB/s]
Received "500: Internal Server Error" Package upload appears to have failed.  Retry 4 of 5
Uploading lxml-4.5.2-cp38-cp38-manylinux2014_aarch64.whl
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6.98M/6.98M [00:01<00:00, 3.75MB/s]
Received "500: Internal Server Error" Package upload appears to have failed.  Retry 5 of 5
NOTE: Try --verbose to see response content.
HTTPError: 500 Internal Server Error from https://gitlab.com/api/v4/projects/20753229/packages/pypi
Internal Server Error

$ twine --version
twine version 3.2.0 (pkginfo: 1.5.0.1, requests: 2.24.0, setuptools: 49.3.1, requests-toolbelt: 0.9.1, tqdm: 4.48.2)

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

Expand for output related to GitLab environment info 

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check 
(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)


(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)


(we will only investigate if the tests are passing)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)

Edited by Tim Rizzi