Make note of MLflow UI issue

[bradleyboehmke]

During class I ran into an issue where launching mlflow ui landed me on a 403 error. This is because there are too many concurrent processes running and you need to kill them. To do so you run the following:

# first, identify the MLflow processes running
ps aux | grep mlflow

# identify the process IDs you want to kill and run the following
# individually for each PID
kill -INT <pid>

If I teach this section again I probably need to keep this handy and maybe make a comment in the notebook so others are aware of the issue and how to resolve it.

[augustopher]

@cunningjames - FYI for the ML notebooks