[Bug 1163773] Re: update-manager hangs during pre-config

[Launchpad Bug Tracker]

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

** Changed in: update-manager (Ubuntu)
       Status: New => Confirmed

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Title:
  update-manager hangs during pre-config

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  I've noticed this in raring with certain kernel packages (though a re-
  try usually does fine).  Basically it looks like there's some sort of
  deadlock.  I tried attaching apport-bug to the aptd, but it just
  whined that there was no "program" associated with that pid.  Perhaps
  because it's root?

  Here's a snippet of `ps fauxw` to show what's going on:

      nick     13113  0.5  3.3 789380 132876 ?       SNl  07:36   0:33 /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-
      nick     13923  0.0  0.8 382532 32932 ?        SNl  08:43   0:00  \_ /usr/bin/perl -w /usr/bin/debconf-communicate
      root     13808  0.1  2.0 262304 80948 ?        SNl  08:42   0:04 /usr/bin/python3.3 /usr/sbin/aptd
      root     13819  0.0  1.2 262488 49980 pts/16   SNs+ 08:42   0:00  \_ /usr/bin/python3.3 /usr/sbin/aptd
      root     13820  0.0  0.0      0     0 pts/16   ZN+  08:42   0:00      \_ [dpkg] <defunct>
      root     13918  0.0  0.0   4440   624 pts/16   SN+  08:43   0:00      \_ /bin/sh -c /usr/sbin/dpkg-preconfigure --apt || true
      root     13919  0.0  0.3  67020 15716 pts/16   SN+  08:43   0:00          \_ /usr/bin/perl -w /usr/sbin/dpkg-preconfigure --apt
      root     13921  0.0  0.0      0     0 pts/16   ZN+  08:43   0:00              \_ [dpkg-preconfigu] <defunct>

  I usually just solve this by killing that dpkg-preconfigure process
  and letting all the apt machinery clean up after it.  I'm not sure how
  to get good debug info out of a running Perl process, but here's open
  files and an strace -p:

      /proc/13919/fd/:
      total 0
      lr-x------ 1 root root 64 Apr  3 09:24 0 -> /dev/tty
      lrwx------ 1 root root 64 Apr  3 09:24 1 -> /dev/pts/16
      lrwx------ 1 root root 64 Apr  3 09:24 2 -> /dev/pts/16
      lrwx------ 1 root root 64 Apr  3 09:24 3 -> socket:[756505]
      lrwx------ 1 root root 64 Apr  3 09:24 4 -> /var/cache/debconf/config.dat
      lrwx------ 1 root root 64 Apr  3 09:24 5 -> /var/cache/debconf/passwords.dat
      lrwx------ 1 root root 64 Apr  3 09:24 54 -> /dev/pts/15
      lrwx------ 1 root root 64 Apr  3 09:24 6 -> /var/cache/debconf/templates.dat
      lr-x------ 1 root root 64 Apr  3 09:24 7 -> pipe:[756506]

      # strace -p 13919
      Process 13919 attached - interrupt to quit
      read(3, 

  I guess it's waiting for input from the program at the other end of
  that pty.  I'm not sure if that's aptd that's meant to do that, or the
  debconf-communicate or some other piece of update-manager.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: update-manager 1:0.185
  ProcVersionSignature: Ubuntu 3.8.0-16.26-generic 3.8.5
  Uname: Linux 3.8.0-16-generic x86_64
  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  Date: Wed Apr  3 09:17:58 2013
  EcryptfsInUse: Yes
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'1364971684'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'610'
   b'com.ubuntu.update-manager' b'window-width' b'968'
  InterpreterPath: /usr/bin/python3.3
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to raring on 2013-03-19 (14 days ago)

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