[Bug 1590321] Re: /usr/bin/unattended-upgrade:FileNotFoundError:/usr/bin/unattended-upgrade at 1468:main:get_dpkg_log_content

[Brian Murray]

Verification for yakkety returned a yes.

Unpacking unattended-upgrades (0.92ubuntu1.1) over (0.92ubuntu1) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for systemd (231-9git1) ...
Setting up unattended-upgrades (0.92ubuntu1.1) ...
Replacing config file /etc/apt/apt.conf.d/50unattended-upgrades with new version
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
Processing triggers for man-db (2.7.5-1) ...
bdmurray at clean-yakkety-amd64:~$ sudo /usr/bin/unattended-upgrades
bdmurray at clean-yakkety-amd64:~$ ls -lh /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
-rw-r--r-- 1 root adm 2.3K Nov 14 13:08 /var/log/unattended-upgrades/unattended-upgrades-dpkg.log


** Tags removed: verification-needed
** Tags added: verification-done-yakkeyt

** Tags removed: verification-done-yakkeyt
** Tags added: verification-done-yakkety

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https://bugs.launchpad.net/bugs/1590321

Title:
  /usr/bin/unattended-upgrade:FileNotFoundError:/usr/bin/unattended-
  upgrade at 1468:main:get_dpkg_log_content

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed
Status in unattended-upgrades source package in Yakkety:
  Fix Committed
Status in unattended-upgrades source package in Zesty:
  Fix Released

Bug description:
  Test Case
  ---------
  1) edit /etc/apt/apt.conf.d/20auto-upgrades so that Update-Package-Lists is 1 and Unattended-Upgrade is 1
  2) sudo apt-get update
  3) sudo /usr/bin/unattended-upgrades (to update the system)
  4) sudo /usr/bin/unattended-upgrades (a second time for some reason)
  5) sudo rm /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
  6) sudo /usr/bin/unattended-upgrades

  Observe the following crash:

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1468, in <module>
      main(options)
    File "/usr/bin/unattended-upgrade", line 1406, in main
      log_content = get_dpkg_log_content(logfile_dpkg, install_start_time)
    File "/usr/bin/unattended-upgrade", line 1075, in get_dpkg_log_content
      with io.open(logfile_dpkg, encoding='utf-8') as fp:
  FileNotFoundError: [Errno 2] No such file or directory: '/var/log/unattended-upgrades/unattended-upgrades-dpkg.log'

  With the version of the package from -proposed you won't receive the
  crash in step 6 and /var/log/unattended-upgrades/unattended-upgrades-
  dpkg.log will exist.

  Regression Potential
  --------------------
  This patch just ends up creating a file if it does not exist. Potential regressions would be a result of the patch being typo'ed e.g. typo'ing os.path.exits instead of os.path.exists and the code failing when a logfile does exist. So read the patch carefully!

  
  Original Description
  --------------------
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with version 0.90, the problem page at https://errors.ubuntu.com/problem/db5f0a803afdf5bb5e20a42ce68f4fda3ce0df8a contains more details.

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