Locking issues? News to me! I have a problem with the database migration pausing during the "[INF] Applying migration 'MigrateRatingLevels'" step and while googling the issue, I haven't seen enough chastising, myself.
As a precaution, I changed my CIFS mount to NFS to no avail. I'm on the cusp of doing all the necessary prep-work to officially submit an issue to GitHub.