potiuk commented on issue #6881: [AIRFLOW-6326] Sort cli commands and arg URL: https://github.com/apache/airflow/pull/6881#issuecomment-570935341 > It's so odd in https://travis-ci.org/apache/airflow/jobs/632880273?utm_medium=notification&utm_source=github_status > Both `tests/test_impersonation.py` and `tests/hooks/test_s3_hook.py` work fun in Breeze but not in Travis, mysql breeze setup with `./breeze --backend mysql --env docker` and run test by `pytest tests/test_impersonation.py tests/hooks/test_s3_hook.py`. > > Did some step I miss for the full test? We have some weird, really weird behaviour - from time to time py37/mysql impersonation_tests are failiing - and then this failure propagates to other tests and eventually hangs the whole build. This seems to be connected to lack of enough resources on travis builds sometimes (we think they are running on shared machines and maybe those run sometimes too many VMS in parallel). We are tracing it down. But so far when the build hanged eventually, we could not see the actual errors - it was not printed by pytest. I just added pytest-instafail: #7064 to show failures immediately when they happen so that when it happens next time we will be able to hunt it down. Of course the builds started to work 🥇 when I added it, so we do not yet know the reason :(
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