[Bug 1506971] Re: ubuntu-release-upgrader bugs regarding dpkg crashes lack useful information

[Brian Murray]

Digging into this a bit more the release upgrader has its own crash
handler in DistUpgradeApport.py and apport_crash is called from the
distribution upgrade frontends. The traceback is passed to apport_crash
and logged to VarLogDistupgradeMain.log.  As an example if we look at
bug 1497581 we can see the following in Main.log.

2015-09-19 14:33:09,165 ERROR got an error from dpkg for pkg: 'urfkill': 'subprocess installed post-installation script returned error exit status 100'
2015-09-19 14:33:09,165 DEBUG running apport_pkgfailure() urfkill: subprocess installed post-installation script returned error exit status 100
2015-09-19 14:33:09,175 ERROR got an error from dpkg for pkg: 'urfkill': 'subprocess installed post-installation script returned error exit status 100'
2015-09-19 14:33:10,386 ERROR not handled expection:
SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1), E:Sub-process /usr/bin/dpkg returned an error code (1)

2015-09-19 14:33:10,386 DEBUG running apport_crash()

Calling apport_crash in this case seems unnecessary as the apport-
package report about urfkill is what we really want. There is a later
crash for which we would want a report.

2015-09-19 14:33:33,468 ERROR not handled expection:
Traceback (most recent call last):

  File "/tmp/ubuntu-release-upgrader-e1xtx4y9/DistUpgrade/DistUpgradeController.py", line 1137, in doDistUpgrade
    res = self.cache.commit(fprogress,iprogress)

  File "/tmp/ubuntu-release-upgrader-e1xtx4y9/DistUpgrade/DistUpgradeCache.py", line 267, in commit
    apt.Cache.commit(self, fprogress, iprogress)

  File "/usr/lib/python3/dist-packages/apt/cache.py", line 505, in commit
    if fetch_progress is None:

SystemError: installArchives() failed


During handling of the above exception, another exception occurred:


TypeError: wait_for_child() takes 1 positional argument but 2 were given

2015-09-19 14:33:33,468 DEBUG running apport_crash()

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https://bugs.launchpad.net/bugs/1506971

Title:
  ubuntu-release-upgrader bugs regarding dpkg crashes lack useful
  information

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

Bug description:
  If we look at the following problem in the Ubuntu Error Tracker we can
  see hundreds of issues with the following duplicate signature -
  "SystemError ( E) Sub-process /usr/bin/dpkg returned an error code
  (1)".

  https://errors.ubuntu.com/problem/d2dd8ddd68b15cbf2c7a6e1dea241adf4a051ac0

  If we look at any specific instance of that problem
  (https://errors.ubuntu.com/oops/887de81c-7421-11e5-a1b7-fa163e4ccdf2)
  we see nothing more informative. This needs to be sorted out so that
  we don't keep binning crashes in that bucket and can create some
  actionable problems.

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