[Bug 1317164] Re: Show reason of TransactionFailed and let the user try again instead of crashing

[snlinla]

Thanks for the update. IT was my error / I never believe, i would get a
reply.

On Thu, Sep 13, 2018 at 11:25 AM Balint Reczey <balint.reczey at canonical.com>
wrote:

> ** Changed in: update-manager (Ubuntu)
>        Status: In Progress => Fix Committed
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1764746).
> https://bugs.launchpad.net/bugs/1317164
>
> Title:
>   Show reason of TransactionFailed and let the user try again instead of
>   crashing
>
> Status in update-manager package in Ubuntu:
>   Fix Committed
>
> Bug description:
>   [Impact]
>
>    * Update-manager crashes when it tries to remove a package that was
>   already removed since update-manager refreshed its cache. A typical
>   scenario is when the list of available packages is updated, then
>   update-manager pops up to notify the user about the updates. The user
>   is not in front of the screen and unattended-upgrades installs the
>   security updates and removes unused kernels making the list of updates
>   shown to the user outdated. User clicks "Install now" and update-
>   manager crashes.
>
>    * The fix shows the reason of the transaction failure then asks
>   offers the user to try again.
>
>   [Test Case ]
>    (with Bionic's package names)
>
>    * Revert the patch for LP: #1791931 since it shadows the issue by
>   filtering the package operations in advance.
>
>    * Install older kernel packages, downgrade a few packages and mark the
> kernels autoremovable:
>      $ sudo eatmydata apt install -y --allow-downgrades
> linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic
> libpoppler73=0.62.0-2ubuntu2 poppler-utils=0.62.0-2ubuntu2 ; sudo
> /etc/kernel/postinst.d/apt-auto-removal ; sudo apt-mark auto
> linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic
>
>    * Start update-manager in a different terminal and _don't_ start the
>   upgrade
>
>    * Remove kernel packages behind u-m's back:
>      $ sudo eatmydata apt remove -y linux-headers-4.15.0-32
>
>    * Start the update on update-manager's GUI and observe it not
>   crashing with the fixed version but showing the reason of the update
>   failing and offering trying it again.
>
>   [Regression Potential]
>
>    * Inaccurate exception handling could shadow other problems.
>
>   [Original bug text]
>
>   On errors.ubuntu.com there are multiple crashes reported about update-
>   manager that end in a Traceback like the following:
>
>   aptdaemon.errors.TransactionFailed: Transaction failed: The package
> system is broken
>    The following packages have unmet dependencies:
>
>   rhythmbox-plugin-magnatune: Depends: rhythmbox (= 3.0.2-0ubuntu2) but
>   3.0.2-0ubuntu1 is installed
>
>   Naturally, the package name varies. I don't believe these are actually
>   crashes about update-manager or aptdaemon. Rather there is something
>   wrong with the users package system. Subsequently, it'd be better if
>   these were not reported to the error tracker and clogging up the bug
>   lists.
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1317164/+subscriptions
>


-- 
*GOD BLESS AMERICA**!               Thank God for Old Farts!*

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1317164

Title:
  Show reason of TransactionFailed and let the user try again instead of
  crashing

Status in update-manager package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

   * Update-manager crashes when it tries to remove a package that was
  already removed since update-manager refreshed its cache. A typical
  scenario is when the list of available packages is updated, then
  update-manager pops up to notify the user about the updates. The user
  is not in front of the screen and unattended-upgrades installs the
  security updates and removes unused kernels making the list of updates
  shown to the user outdated. User clicks "Install now" and update-
  manager crashes.

   * The fix shows the reason of the transaction failure then asks
  offers the user to try again.

  [Test Case ]
   (with Bionic's package names)

   * Revert the patch for LP: #1791931 since it shadows the issue by
  filtering the package operations in advance.

   * Install older kernel packages, downgrade a few packages and mark the kernels autoremovable:
     $ sudo eatmydata apt install -y --allow-downgrades linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic libpoppler73=0.62.0-2ubuntu2 poppler-utils=0.62.0-2ubuntu2 ; sudo /etc/kernel/postinst.d/apt-auto-removal ; sudo apt-mark auto linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic

   * Start update-manager in a different terminal and _don't_ start the
  upgrade

   * Remove kernel packages behind u-m's back:
     $ sudo eatmydata apt remove -y linux-headers-4.15.0-32

   * Start the update on update-manager's GUI and observe it not
  crashing with the fixed version but showing the reason of the update
  failing and offering trying it again.

  [Regression Potential]

   * Inaccurate exception handling could shadow other problems.

  [Original bug text]

  On errors.ubuntu.com there are multiple crashes reported about update-
  manager that end in a Traceback like the following:

  aptdaemon.errors.TransactionFailed: Transaction failed: The package system is broken
   The following packages have unmet dependencies:

  rhythmbox-plugin-magnatune: Depends: rhythmbox (= 3.0.2-0ubuntu2) but
  3.0.2-0ubuntu1 is installed

  Naturally, the package name varies. I don't believe these are actually
  crashes about update-manager or aptdaemon. Rather there is something
  wrong with the users package system. Subsequently, it'd be better if
  these were not reported to the error tracker and clogging up the bug
  lists.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1317164/+subscriptions