What is to blame here? Is it a local issue or an issue with an ESET server under high load?
Until I understand where the locus of this failure mode is, I cannot justify the time spent looking at this issue, and must stop efs.service.
I saw a couple other topics on this, but never a clear statement or outcome, or a resulting KB to spread the knowledge about this error message which I'm sure a lot of people have experienced, and will continue to experience.
Related ticket I filed today to get the ball rolling with support: #00520204