I can't imagine why the kernel is deleting a mount point here, stale mount or otherwise. But it seems to me this is a bug in umount from util-linux, not in nfs-utils.
** Package changed: nfs-utils (Ubuntu) => util-linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/974374 Title: Error on unmounting a NFSv4 share To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/974374/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs