distributed.diskutils INFO showing in notebook cell

[ncclementi]

When I'm on a Jupyterlab session, sometimes when starting a client, with Local cluster. I don't have a reproducer as this happens only sometimes. But the following logs appear on red when I run:

from dask.distributed import Client

client = Client(n_workers=4)

2022-06-29 07:53:44,649 - distributed.diskutils - INFO - Found stale lock file and directory '/Users/ncclementi/Documents/git/my_forks/dask-tutorial/dask-worker-space/worker-2tl8qil1', purging
2022-06-29 07:53:44,650 - distributed.diskutils - INFO - Found stale lock file and directory '/Users/ncclementi/Documents/git/my_forks/dask-tutorial/dask-worker-space/worker-bl6_3xyz', purging
2022-06-29 07:53:44,650 - distributed.diskutils - INFO - Found stale lock file and directory '/Users/ncclementi/Documents/git/my_forks/dask-tutorial/dask-worker-space/worker-xwo8clv2', purging
2022-06-29 07:53:44,650 - distributed.diskutils - INFO - Found stale lock file and directory '/Users/ncclementi/Documents/git/my_forks/dask-tutorial/dask-worker-space/worker-e7vgwheh', purging

I usually can "fix" this by deleting the existing dask-worker-space directory.
Environment:

• Dask version: 2022.6.1
• Python version: 3.9
• Operating System: MacOS
• Install method (conda, pip, source): conda

[fjetter]

This should only happen if your previous process running the cluster died unexpectedly. If a previous cluster died without giving the worker time to close gracefully (e.g. a SIGKILL) distributed will notice "stale" locks of earlier worker instances once started and is cleaning this up.

[ncclementi]

This should only happen if your previous process running the cluster died unexpectedly

Is restarting a notebook kernel or an interrupt qualify as "unexpected"?

distributed will notice "stale" locks of earlier worker instances once started and is cleaning this up.

This makes sense but, do we need the red warning on the notebooks? I feel this puts users off because it's red. It can also be hard to understand for beginners if there is something wrong or not.

[ncclementi]

It's fairly common to restart your kernel when working on a notebook, and this happens when doing so.

[fjetter]

I'm open to lowering this log to debug level