[Bug 1770224] Re: unattended-upgrades crashes with: apt_pkg.Error: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages

[Balint Reczey]

Resolver, just fixed the trace from the error.

** Description changed:

  It seems pkgProblemResolver is hitting an internal bug quite frequently
  with latest u-u:
  
  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1927, in <module>
      sys.exit(main(options))
-   File "/usr/bin/unattended-upgrade", line 1822, in main
-     options.dry_run)
-   File "/usr/bin/unattended-upgrade", line 1399, in do_auto_remove
-     res, error = cache_commit(cache, logfile_dpkg, verbose)
-   File "/usr/bin/unattended-upgrade", line 513, in cache_commit
-     res = cache.commit(install_progress=iprogress)
-   File "/usr/lib/python3/dist-packages/apt/cache.py", line 565, in commit
-     res = self._fetch_archives(fetcher, pm)
-   File "/usr/lib/python3/dist-packages/apt/cache.py", line 385, in _fetch_archives
-     raise LockFailedException("Failed to lock %s" % lockfile)
- apt.cache.LockFailedException: Failed to lock /var/cache/apt/archives/lock
+   File "/usr/bin/unattended-upgrade", line 1678, in main
+     pkg.mark_upgrade(from_user=not pkg.is_auto_installed)
+   File "/usr/lib/python3/dist-packages/apt/package.py", line 1483, in mark_upgrade
+     self.mark_install(from_user=from_user)
+   File "/usr/lib/python3/dist-packages/apt/package.py", line 1475, in mark_install
+     fixer.resolve(True)
+ apt_pkg.Error: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
  
- 
- I believe this should be fixed in apt rather than just catching it in u-u.
+ I believe this should be fixed in apt rather than just catching it in
+ u-u.
  
  More info:
  
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 1.1ubuntu1, the problem page at https://errors.ubuntu.com/problem/49de8d44b4ceccb27b66921173ee7e837e7a1e54 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

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https://bugs.launchpad.net/bugs/1770224

Title:
  unattended-upgrades crashes with: apt_pkg.Error: E:Error,
  pkgProblemResolver::Resolve generated breaks, this may be caused by
  held packages

Status in apt package in Ubuntu:
  New

Bug description:
  It seems pkgProblemResolver is hitting an internal bug quite
  frequently with latest u-u:

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 1927, in <module>
      sys.exit(main(options))
    File "/usr/bin/unattended-upgrade", line 1678, in main
      pkg.mark_upgrade(from_user=not pkg.is_auto_installed)
    File "/usr/lib/python3/dist-packages/apt/package.py", line 1483, in mark_upgrade
      self.mark_install(from_user=from_user)
    File "/usr/lib/python3/dist-packages/apt/package.py", line 1475, in mark_install
      fixer.resolve(True)
  apt_pkg.Error: E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

  I believe this should be fixed in apt rather than just catching it in
  u-u.

  More info:

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 1.1ubuntu1, the problem page at https://errors.ubuntu.com/problem/49de8d44b4ceccb27b66921173ee7e837e7a1e54 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

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