[Bug 1827280] Re: unattended-upgrade fails silently in qemu VM

[Balint Reczey]

*** This bug is a duplicate of bug 1823872 ***
    https://bugs.launchpad.net/bugs/1823872

** This bug has been marked a duplicate of bug 1823872
   Fixing fsfreeze-hook can break unattended upgrades

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https://bugs.launchpad.net/bugs/1827280

Title:
  unattended-upgrade fails silently in qemu VM

Status in unattended-upgrades package in Ubuntu:
  New

Bug description:
  Since upgrading to 1.1ubuntu1.18.04.9 on several servers (VMs) unattended upgrades stopped to run successfully an did not report any errors (via mail).
  If I run it manually it errors out as follows:

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 2057, in <module>
      sys.exit(main(options))
    File "/usr/bin/unattended-upgrade", line 1773, in main
      if conffile_prompt(item.destfile):
    File "/usr/bin/unattended-upgrade", line 988, in conffile_prompt
      with open(prefix + conf_file, 'rb') as fp:
  IsADirectoryError: [Errno 21] Is a directory: '/etc/qemu/fsfreeze-hook'

  This also happens with Package Version: 1.1ubuntu1.18.04.10

  Expected behavior:
  Either the the program runs without error or the cron job sends a failure mail. 

  Here come the logfiles, where you cannot see any errors when on
  1.1ubuntu1.18.04.9, but after manually upgrading to
  1.1ubuntu1.18.04.10 there are warnings:

  2019-05-01 20:28:13,071 INFO Initial whitelisted packages: 
  2019-05-01 20:28:13,071 INFO Starting unattended upgrades script
  2019-05-01 20:28:13,071 INFO Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic, o=LP-PPA-certbot-certbot,a=bionic, o=LP-PPA-ondrej-nginx-mainline,a=bionic, o=LP-PPA-ondrej-php,a=bionic
  2019-05-01 20:39:29,902 INFO Initial blacklisted packages: libc.* linux-.* .*-microcode mysql-.* mariadb-.*
  2019-05-01 20:39:29,903 INFO Initial whitelisted packages: 
  2019-05-01 20:39:29,903 INFO Starting unattended upgrades script
  2019-05-01 20:39:29,903 INFO Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic, o=LP-PPA-certbot-certbot,a=bionic, o=LP-PPA-ondrej-nginx-mainline,a=bionic, o=LP-PPA-ondrej-php,a=bionic
  2019-05-01 20:57:47,643 INFO Initial blacklisted packages: libc.* linux-.* .*-microcode mysql-.* mariadb-.*
  2019-05-01 20:57:47,644 INFO Initial whitelisted packages: 
  2019-05-01 20:57:47,644 INFO Starting unattended upgrades script
  2019-05-01 20:57:47,644 INFO Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic, o=LP-PPA-certbot-certbot,a=bionic, o=LP-PPA-ondrej-nginx-mainline,a=bionic, o=LP-PPA-ondrej-php,a=bionic
  2019-05-01 21:08:48,278 INFO Initial blacklisted packages: libc.* linux-.* .*-microcode mysql-.* mariadb-.*
  2019-05-01 21:08:48,278 INFO Initial whitelisted packages: 
  2019-05-01 21:08:48,279 INFO Starting unattended upgrades script
  2019-05-01 21:08:48,279 INFO Allowed origins are: o=Ubuntu,a=bionic, o=Ubuntu,a=bionic-security, o=UbuntuESM,a=bionic, o=LP-PPA-certbot-certbot,a=bionic, o=LP-PPA-ondrej-nginx-mainline,a=bionic, o=LP-PPA-ondrej-php,a=bionic
  2019-05-01 21:08:57,611 WARNING package libxslt1.1 upgradable but fails to be marked for upgrade (E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.)
  2019-05-01 21:08:59,398 WARNING package ntfs-3g upgradable but fails to be marked for upgrade (E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.)

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