[Bug 1871824] Re: /usr/bin/unattended-upgrade:apt.cache.LockFailedException:__enter__:/usr/bin/unattended-upgrade at 2512:main:run:do_auto_remove:cache_commit:commit:__enter__

[Balint Reczey]

** Description changed:

+ Traceback (most recent call last):
+   File "/usr/lib/python3/dist-packages/apt/cache.py", line 90, in __enter__
+     return self._lock.__enter__()
+ apt_pkg.Error: E:Could not get lock /var/cache/apt/archives/lock. It is held by process 2600 (synaptic)
+ 
+ During handling of the above exception, another exception occurred:
+ 
+ Traceback (most recent call last):
+   File "/usr/bin/unattended-upgrade", line 2512, in <module>
+     sys.exit(main(options))
+   File "/usr/bin/unattended-upgrade", line 1986, in main
+     res = run(options, rootdir, mem_log, logfile_dpkg,
+   File "/usr/bin/unattended-upgrade", line 2307, in run
+     kernel_pkgs_kept_installed) = do_auto_remove(
+   File "/usr/bin/unattended-upgrade", line 1876, in do_auto_remove
+     res, error = cache_commit(cache, logfile_dpkg, verbose)
+   File "/usr/bin/unattended-upgrade", line 861, in cache_commit
+     res = cache.commit(install_progress=iprogress)
+   File "/usr/lib/python3/dist-packages/apt/cache.py", line 675, in commit
+     with self._archive_lock:
+   File "/usr/lib/python3/dist-packages/apt/cache.py", line 92, in __enter__
+     raise LockFailedException(("Failed to lock directory %s: %s") %
+ apt.cache.LockFailedException: Failed to lock directory /var/cache/apt/archives/: E:Could not get lock /var/cache/apt/archives/lock. It is held by process 2600 (synaptic)
+ 
+ --
+ 
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 2.1, the problem page at https://errors.ubuntu.com/problem/4eb313e6525a788c7921331a31ca051b830f1fc6 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/.

** Summary changed:

- /usr/bin/unattended-upgrade:apt.cache.LockFailedException:__enter__:/usr/bin/unattended-upgrade at 2512:main:run:do_auto_remove:cache_commit:commit:__enter__
+ Can't take lock while synaptic is running

** Also affects: synaptic (Ubuntu)
   Importance: Undecided
       Status: New

** Summary changed:

- Can't take lock while synaptic is running
+ Can't take archive lock while synaptic is running

** Changed in: unattended-upgrades (Ubuntu)
       Status: New => Invalid

-- 
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https://bugs.launchpad.net/bugs/1871824

Title:
  Can't take archive lock while synaptic is running

Status in synaptic package in Ubuntu:
  New
Status in unattended-upgrades package in Ubuntu:
  Invalid

Bug description:
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 90, in __enter__
      return self._lock.__enter__()
  apt_pkg.Error: E:Could not get lock /var/cache/apt/archives/lock. It is held by process 2600 (synaptic)

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/usr/bin/unattended-upgrade", line 2512, in <module>
      sys.exit(main(options))
    File "/usr/bin/unattended-upgrade", line 1986, in main
      res = run(options, rootdir, mem_log, logfile_dpkg,
    File "/usr/bin/unattended-upgrade", line 2307, in run
      kernel_pkgs_kept_installed) = do_auto_remove(
    File "/usr/bin/unattended-upgrade", line 1876, in do_auto_remove
      res, error = cache_commit(cache, logfile_dpkg, verbose)
    File "/usr/bin/unattended-upgrade", line 861, in cache_commit
      res = cache.commit(install_progress=iprogress)
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 675, in commit
      with self._archive_lock:
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 92, in __enter__
      raise LockFailedException(("Failed to lock directory %s: %s") %
  apt.cache.LockFailedException: Failed to lock directory /var/cache/apt/archives/: E:Could not get lock /var/cache/apt/archives/lock. It is held by process 2600 (synaptic)

  --

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 2.1, the problem page at https://errors.ubuntu.com/problem/4eb313e6525a788c7921331a31ca051b830f1fc6 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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