[Bug 1758529] Re: landscape-package-changer crashed with io.UnsupportedOperation in pulse(): fileno

[Eric Desrochers]

** Information type changed from Private to Public

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Title:
  landscape-package-changer crashed with io.UnsupportedOperation in
  pulse(): fileno

Status in Landscape Client:
  Fix Committed
Status in landscape-client package in Ubuntu:
  Fix Released
Status in python-apt package in Ubuntu:
  Invalid
Status in landscape-client source package in Bionic:
  In Progress
Status in python-apt source package in Bionic:
  Invalid
Status in landscape-client source package in Disco:
  Won't Fix
Status in python-apt source package in Disco:
  Invalid
Status in landscape-client source package in Eoan:
  In Progress
Status in python-apt source package in Eoan:
  Invalid

Bug description:
  [Impact]

   * landscape-package-changer will output stack traces when executed
     with python3. This adds noise in the logs and confuse apport into
     thinking there was a crash, even though the error does not affect
     functionality.

   * The activity log for package operations will also show errors.

   * The patch overrides python-apt reporting of progress, as
     landscape-package-changer is never executed from a terminal.

  [Test Case]

   * register landscape-client and wait for packages to be reported.

   * trigger a package installation from the landscape server.

   * check /var/log/landscape/manager.log for Package changer warnings

  [Regression Potential]

   * The change is trivially simple.

   * The changed code path is only used by python-apt progress reporting.
     Since landscape-package-changer does not rely on it and is able
     to continue, other errors would likely have the same fate: that is
     crashing the progress reporting thread and continuing.

  [Original Description]

  Crash in the background

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: landscape-client 18.01-0ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
  Uname: Linux 4.15.0-12-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  Date: Sat Mar 24 07:05:34 2018
  ExecutablePath: /usr/bin/landscape-package-changer
  InstallationDate: Installed on 2015-07-04 (994 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  InterpreterPath: /usr/bin/python3.6
  ProcCmdline: /usr/bin/python3 /usr/bin/landscape-package-changer --quiet
  ProcEnviron:
   LANGUAGE=en_GB:en
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
  Python3Details: /usr/bin/python3.6, Python 3.6.5rc1, python3-minimal, 3.6.4-1
  PythonArgs: ['/usr/bin/landscape-package-changer', '--quiet']
  PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
  SourcePackage: landscape-client
  Title: landscape-package-changer crashed with io.UnsupportedOperation in pulse(): fileno
  Traceback:
   Traceback (most recent call last):
     File "/usr/lib/python3/dist-packages/apt/progress/text.py", line 164, in pulse
       not os.isatty(self._file.fileno())):
   io.UnsupportedOperation: fileno
  UpgradeStatus: Upgraded to bionic on 2018-03-15 (8 days ago)
  UserGroups:

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