We installed Airflow 1.7, and used it for several months. I used PIP to uninstall ariflow 1.7 and install 1.9 (gory details are [here|https://stackoverflow.com/questions/49544320/airflow-initdb-failed-importerror-no-module-named-log-logging-mixin).]
Since then, I haven't had a single DAG run. I renamed and moved log files to match the 1.9 expectations, but still nothing happens.
I have a "run every 40 minutes" DAG, it hasn't run since 3/28. When I manually trigger it, no log file is created, nothing happens except I get a running DAG listed under "DAG Runs" (I do NOT get anything listed under "Recent Tasks", and "Last Run" does not get updated.
I have a "Run once" DAG that I created. I triggered it, same behavior.
I have also tried running the example_bash_operator DAG. Same behavior. (I've attached the example_bash_operator.py file, so we're clear what I tried to run)