Installing ddtrace breaks tests with the jsonschema library

[fr-ser]

Summary of problem

Just installing (not even using) the newest version of ddtrace causes the tests to break, when the jsonschema package is used.

Which version of dd-trace-py are you using?

2.9.3

Which version of pip are you using?

pip 23.3.2 (python 3.8)

Which libraries and their versions are you using?

`pip freeze`

attrs==23.2.0 exceptiongroup==1.2.2 importlib_resources==6.4.0 iniconfig==2.0.0 jsonschema==4.23.0 jsonschema-specifications==2023.12.1 packaging==24.1 pkgutil_resolve_name==1.3.10 pluggy==1.5.0 pytest==8.3.2 referencing==0.35.1 rpds-py==0.19.1 tomli==2.0.1 zipp==3.19.2

How can we reproduce your problem?

Here is a repository with a reproducible example: https://github.com/fr-ser/bug-example-ddtrace-jsonschema

Here is a summary of that repo:

1. Install the environment: poetry install --no-root
2. Run the test: poetry run pytest
3. See an error
4. uninstall ddtrace: poetry remove ddtrace
5. run the test: poetry run pytest
6. it works ¯_(ツ)_/¯

What is the result that you get?

    test_main.py:1: in <module>
        import jsonschema
    <frozen importlib._bootstrap>:991: in _find_and_load
        ???
    <frozen importlib._bootstrap>:975: in _find_and_load_unlocked
        ???
    <frozen importlib._bootstrap>:671: in _load_unlocked
        ???
    .venv/lib/python3.8/site-packages/ddtrace/internal/module.py:220: in _exec_module
        self.loader.exec_module(module)
    .venv/lib/python3.8/site-packages/jsonschema/__init__.py:16: in <module>
        from jsonschema.validators import (
    <frozen importlib._bootstrap>:991: in _find_and_load
        ???
    <frozen importlib._bootstrap>:975: in _find_and_load_unlocked
        ???
    <frozen importlib._bootstrap>:671: in _load_unlocked
        ???
    .venv/lib/python3.8/site-packages/ddtrace/internal/module.py:220: in _exec_module
        self.loader.exec_module(module)
    .venv/lib/python3.8/site-packages/jsonschema/validators.py:603: in <module>
        meta_schema=SPECIFICATIONS.contents(
    .venv/lib/python3.8/site-packages/referencing/_core.py:483: in contents
        return self[uri].contents
    .venv/lib/python3.8/site-packages/referencing/_core.py:333: in __getitem__
        raise exceptions.NoSuchResource(ref=uri) from None
    E   referencing.exceptions.NoSuchResource: 'http://json-schema.org/draft-03/schema#'
    ========================================================================================================== short test summary info ===========================================================================================================
    ERROR test_main.py - referencing.exceptions.NoSuchResource: 'http://json-schema.org/draft-03/schema#'

What is the result that you expected?

No error

[emmettbutler]

Thanks for reporting this, @fr-ser - it's a weird one! We'll look into it.

[fr-ser]

By now I know that the error is fixed with Python 3.9 if that helps

[timmc-edx]

Even weirder, when I just run using pytest I don't get the error, but if I run our tests using tox I do get the error. I can't figure out what the environmental difference is! For reference, this is happening in branch timmc/repro-ddtrace-jsonschema of https://github.com/edx/edx-arch-experiments with Python 3.11. In a 3.11 virtualenv, run make requirements and then tox -e py38-django42 to run tests. I'll see if there's a version combo that changes things...

[EDIT] ...never mind, tox was controlling the version of Python! I can confirm that if I bump to 3.11 inside tox, it works fine. It's just with 3.8 that I see the problem.