[Bug 2058515] Re: update-manager fails when other pro bins are available

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/2058515

Title:
  update-manager fails when other pro bins are available

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  While attempting an upgrade with `sudo update-manager -dc` the program
  failed with the following error:

  Unexpected error(s) occurred.
  For more details, see the log: /var/log/ubuntu-advantage.log
  To file a bug run: ubuntu-bug ubuntu-advantage-tools
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/InstallBackendAptdaemon.py", line 448, in _on_finished
      self._action_done(action,
    File "/usr/lib/python3/dist-packages/UpdateManager/backend/__init__.py", line 365, in _action_done
      self.window_main.start_available()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 241, in start_available
      self.refresh_cache()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 459, in refresh_cache
      self._get_ua_security_status()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 285, in _get_ua_security_status
      s = json.load(p.stdout)
    File "/usr/lib/python3.10/json/__init__.py", line 293, in load
      return loads(fp.read(),
    File "/usr/lib/python3.10/json/__init__.py", line 346, in loads
      return _default_decoder.decode(s)
    File "/usr/lib/python3.10/json/decoder.py", line 337, in decode
      obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    File "/usr/lib/python3.10/json/decoder.py", line 355, in raw_decode
      raise JSONDecodeError("Expecting value", s, err.value) from None
  json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

  
  I fixed it on my own machine by changing /usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py at the function _get_ua_security_status, where running `pro security-status --format=json`, I replaced `pro` with `usr/bin/pro`. Apparently, there are other executables that may have that same name and not specifying the full path allows for name collisions.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubuntu-release-upgrader-core 1:22.04.19
  ProcVersionSignature: Ubuntu 6.5.0-26.26~22.04.1-generic 6.5.13
  Uname: Linux 6.5.0-26-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports:
   640:1000:124:526616:2024-03-19 22:55:26.337597131 +0100:2024-03-19 22:55:27.337597131 +0100:/var/crash/_usr_bin_update-manager.1000.crash
   600:117:124:37:2024-03-19 23:09:00.739389126 +0100:2024-03-19 23:09:00.739389126 +0100:/var/crash/_usr_bin_update-manager.1000.uploaded
   664:1000:124:0:2024-03-19 23:08:59.043385432 +0100:2024-03-19 23:08:59.043385432 +0100:/var/crash/_usr_bin_update-manager.1000.upload
   640:0:124:103722:2024-03-20 18:46:35.799700926 +0100:2024-03-20 18:46:35.799700926 +0100:/var/crash/_usr_bin_update-manager.0.crash
  CurrentDesktop: Unity
  Date: Wed Mar 20 18:54:46 2024
  InstallationDate: Installed on 2023-12-10 (101 days ago)
  InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: No upgrade log present (probably fresh install)

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