Pytest hangs forever with Github Actions

After collecting the items, it hangs until Github’s timeout. Example there: https://github.com/Mulugruntz/celery-pubsub/runs/2668823507?check_suite_focus=true#step:7:22

What is weird is that on another project, setup in a very similar (but not same) way, it works fine: https://github.com/Mulugruntz/aiosubprocess/runs/2665341529?check_suite_focus=true#step:7:50

On my local, it works (famous words… 🙄 )

on local

coverage run -m pytest tests && coverage report && coverage xml
========================================= test session starts ==========================================
platform darwin -- Python 2.7.16, pytest-4.6.11, py-1.10.0, pluggy-0.13.1
rootdir: /Users/sgiffard/PycharmProjects/celery-pubsub, inifile: pytest.ini, testpaths: tests
collected 10 items                                                                                     

tests/test_pubsub.py ..........                                                                  [100%]

====================================== slowest 10 test durations =======================================
0.01s call     tests/test_pubsub.py::test_subscription

(0.00 durations hidden.  Use -vv to show these durations.)
====================================== 10 passed in 0.10 seconds =======================================
Name                        Stmts   Miss Branch BrPart  Cover
-------------------------------------------------------------
celery_pubsub/__init__.py       2      0      0      0   100%
celery_pubsub/pubsub.py        47      0     10      0   100%
tests/__init__.py               0      0      0      0   100%
tests/conftest.py              49      0      0      0   100%
tests/test_pubsub.py           62      0      0      0   100%
-------------------------------------------------------------
TOTAL                         160      0     10      0   100%

on Github Actions (first link, above)

============================= test session starts ==============================
platform linux2 -- Python 2.7.18, pytest-4.6.11, py-1.10.0, pluggy-0.13.1
rootdir: /home/runner/work/celery-pubsub/celery-pubsub, inifile: pytest.ini, testpaths: tests
plugins: celery-4.4.7
collected 10 items

Only Python version is different (but minor). And it’s on python 2.7 for the example but it also fails on all the other tested versions (cpython 2.7, 3.6, 3.7, 3.8 and pypy 2.7, 3.6, 3.7).

It looks like a bug. Not sure where. Maybe Github Actions, maybe pytest?

[kahkeong]

I also faced the same issue but I found out the root cause is due to Django version. I was using Django 3.1.12 with two databases aliases like below.

DATABASES = {
    "default": env.db("DATABASE_URL"),
    "another_connection": env.db("DATABASE_URL")
}
DATABASES["another_connection"]['OPTIONS'] = {'isolation_level': psycopg2.extensions.ISOLATION_LEVEL_REPEATABLE_READ}

Occasionally, Django will use the second connection to create the test database and I believe it messed up the test setup and caused my Github Actions to stuck after “Collected xx items” This bug is resolved at https://github.com/django/django/pull/13507/files with Django 3.2 version, haven’t encountered this issue since I upgraded Django to 3.2. Hope you find this comment helpful !

[Mulugruntz]

@em1208 No, I had some other stuffs to take care of. I haven’t been able to fix it yet.