Per the upstream bug, this is a generic kind of error condition that can crop up from a variety of different root causes, which need independent diagnosis.
For this package, before filing more bugs on this type of issue I would suggest going through regular tech support channels first, to identify the root cause and (ideally) an upstreamable patch that resolves it. I get the sense from the comments here and on the upstream bug, that people saw the issue mainly on Xenial, so am guessing with Bionic and newer the issue is resolved? This may suggest a backportable fix is available in a newer version, so a bug report identifying that fix and including a straightforward test case to reproduce it, might be feasible to do as an SRU. ** Changed in: docker.io (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1628053 Title: Hangs when searching for a subnet for the docker0 bridge To manage notifications about this bug go to: https://bugs.launchpad.net/docker.io/+bug/1628053/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs