I've a situation, where I'm basically running the scheduler and workers in a docker environment (it's a project at https://cocalc.com ). Version 1.25.2 it works fine, but starting with 1.25.3 I only get

distributed.worker - INFO - Waiting to connect to:       tcp://localhost:8786

and well, it never does. There are only few changes, though… so maybe this help to narrow down this regression.

scheduler started via dask-scheduler and worker via dask-worker tcp://localhost:8786 --local-directory ~/dask-worker --nthreads 1 --nprocs 1 --memory-limit 256M