** Changed in: apt (Ubuntu)
Status: Triaged => In Progress
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https://bugs.launchpad.net/bugs/1723761
Title:
unattended-upgrade hangs on shutdown when network is required for
updates
Status in apt package in Ubuntu:
In Progress
Status in unattended-upgrades package in Ubuntu:
Fix Released
Bug description:
Recently an update for flashplugin-installer on xenial was available
in the ubuntu repositories.
During the installation of this package a blob is downloaded from
Adobe servers, which requires network connectivity/internet access.
Because the network interface(s) have already stopped when this
package is installed, the server cannot be reached, thus blocking the
shutdown process until a timeout kills the unattended-upgrades
process.
On my machines the shutdown takes about 30 minutes in this case. The
systemd configuration is standard here, except for a few additional
services.
A possible fix could be adding After=network-online.target
NetworkManager-wait-online.service to After= in the systemd unit file.
As a workaround I pinned the flashplugin-installer to -1:
#echo >/etc/apt/preferences.d/forbid_flashplugin "\
Package: flashplugin-installer
Pin: release *
Pin-Priority: -1";
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