[Bug 1690980] Re: unattended-upgrades does not block shutdown of system, as it is designed to

[ethan.hsieh]

@Balint

Here is test result for InstallOnShutdown:true

"Errors were encountered while processing: apport"
u-u still has packages to upgrade after this issue happens.
So, when I reboot system every time, u-u still tries to upgrade package.
We expect that there are 30 mins to do the update.
But, dependency problem will prevent u-u from upgrading packages. 

1. unattended-upgrades-shutdown.log: (Please check full log as attached)
----------------
2017-09-22 14:54:25,865 WARNING - Running unattended-upgrades in shutdown mode
14:54:25~14:55:54 => 1:29, u-u only takes 1:29 to upgrade packges.
2017-09-22 14:57:02,183 WARNING - Running unattended-upgrades in shutdown mode
14:57:02~14:58:30 => 1:28
2017-09-22 15:00:00,233 WARNING - Running unattended-upgrades in shutdown mode
15:00:00~15:01:28 => 1:28
----------------

2. unattended-upgrades-dpkg.log: 
----------------
Log started: 2017-09-22  14:34:24
...
Preparing to unpack .../apport_2.20.1-0ubuntu2.10_all.deb ...
Failed to get load state of apport-forward.socket: Connection reset by peer
2017-09-22 14:37:26,769 WARNING SIGTERM received, will stop
Log ended: 2017-09-22  14:37:26
----------------

Installed packages:
apt (1.2.25-rbalint2) 
unattended-upgrades_0.96ubuntu1-16.04.1_all.deb

** Attachment added: "unattended-upgrades-shutdown.log, unattended-upgrades.log, apt log, and dpkg log"
   https://bugs.launchpad.net/oem-priority/+bug/1690980/+attachment/4954864/+files/log_0922_InstallOnShutdown.tar.gz

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https://bugs.launchpad.net/bugs/1690980

Title:
  unattended-upgrades does not block shutdown of system, as it is
  designed to

Status in OEM Priority Project:
  Triaged
Status in OEM Priority Project xenial series:
  New
Status in apt package in Ubuntu:
  Fix Released
Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Triaged
Status in unattended-upgrades source package in Xenial:
  New
Status in apt source package in Zesty:
  Triaged
Status in unattended-upgrades source package in Zesty:
  New

Bug description:
  Title: No pop-up window to warn users that system should not reboot or
  shutdown while installing security updates

  Summary:
  No pop-up window to warn users that system should not reboot or shutdown while installing security updates

  Steps:
  1. trigger unattended-upgrades
  2. reboot or shutdown system while installing packages

  Expected results: There is a pop-up window to warn users that system
  should not reboot or shutdown

  Actual results: There is no pop-up window to warn users

  Additional information:
  $ apt-cache policy unattended-upgrades
  unattended-upgrades:
    Installed: 0.90
    Candidate: 0.90ubuntu0.5
  $ lsb_release -rd
  Description:    Ubuntu 16.04 LTS

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