[Bug 1115465] Re: debootstrap 1.0.39ubuntu0.2 installation hangs at "Unpacking replacement debootstrap ..." phase of dpkg

Mon Feb 4 18:40:55 UTC 2013

Even after forcing dpkg to remove debootstrap:

dpkg --force-all -r debootstrap
dpkg: warning: overriding problem because --force enabled:
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting a removal.
(Reading database ... 
dpkg: warning: files list file for package `debootstrap' missing, assuming package has no files currently installed.
(Reading database ... 253879 files and directories currently installed.)
Removing debootstrap ...

...and then trying to re-install, dpkg still hangs & leaves a <defunct>
process behind.

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Title:
  debootstrap 1.0.39ubuntu0.2 installation hangs at "Unpacking
  replacement debootstrap ..." phase of dpkg

Status in “debootstrap” package in Ubuntu:
  New

Bug description:
  Created from Question #221018...

  3.2.0-36-generic-pae on Ubuntu 12.04.1 LTS.

  The "Unpacking replacement debootstrap ..." phase of dpkg --auto-
  deconfigure is hanging, no CPU or I/O currently being used:

  /usr/bin/dpkg --status-fd 47 --unpack --auto-deconfigure
  /var/cache/apt/archives/debootstrap_1.0.39ubuntu0.2_all.deb
  /var/cache/apt/archives/base-files_6.5ubuntu6.5_i386.deb

  No lack of disk-space:

  Filesystem Size Used Avail Use% Mounted on
  /dev/mapper/ubuntu-root 455G 25G 408G 6% /
  udev 2.0G 4.0K 2.0G 1% /dev
  tmpfs 792M 1004K 791M 1% /run
  none 5.0M 0 5.0M 0% /run/lock
  none 2.0G 404K 2.0G 1% /run/shm
  cgroup 2.0G 0 2.0G 0% /sys/fs/cgroup
  /dev/sda1 248M 83M 153M 36% /boot

  Here is ps aux | grep dpkg output showing dpkg-deb process marked as defunct:

  root 13902 0.0 1.1 50924 47288 pts/2 Ss+ 10:16 0:00 /usr/bin/dpkg --status-fd 47 --unpack --auto-deconfigure /var/cache/apt/archives/debootstrap_1.0.39ubuntu0.2_all.deb /var/cache/apt/archives/base-files_6.5ubuntu6.5_i386.deb
  root 13921 0.0 0.0 0 0 pts/2 Z+ 10:17 0:00 [dpkg-deb] <defunct>'

  And here's a backtrace of the dpkg process from GDB:

  Attaching to process 13902
  Reading symbols from /usr/bin/dpkg...(no debugging symbols found)...done.
  Reading symbols from /lib/i386-linux-gnu/libselinux.so.1...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libselinux.so.1
  Reading symbols from /lib/i386-linux-gnu/libc.so.6...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libc.so.6
  Reading symbols from /lib/i386-linux-gnu/libdl.so.2...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libdl.so.2
  Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
  Loaded symbols for /lib/ld-linux.so.2
  Reading symbols from /lib/i386-linux-gnu/libnss_compat.so.2...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libnss_compat.so.2
  Reading symbols from /lib/i386-linux-gnu/libnsl.so.1...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libnsl.so.1
  Reading symbols from /lib/i386-linux-gnu/libnss_nis.so.2...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libnss_nis.so.2
  Reading symbols from /lib/i386-linux-gnu/libnss_files.so.2...(no debugging symbols found)...done.
  Loaded symbols for /lib/i386-linux-gnu/libnss_files.so.2
  0xb774b424 in __kernel_vsyscall ()
  (gdb) bt
  #0 0xb774b424 in __kernel_vsyscall ()
  #1 0xb764833c in close () from /lib/i386-linux-gnu/libc.so.6
  #2 0x0804c1fd in ?? ()
  #3 0x0806a5f9 in ?? ()
  #4 0x0805b2ab in ?? ()
  #5 0x0804dd56 in ?? ()
  #6 0x0804a3f3 in ?? ()
  #7 0xb75834d3 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
  #8 0x0804a4c5 in ?? ()

  dpkg.log:

  2013-02-04 10:17:03 upgrade debootstrap 1.0.39ubuntu0.2 1.0.39ubuntu0.2
  2013-02-04 10:17:03 status half-installed debootstrap 1.0.39ubuntu0.2
  2013-02-04 10:56:43 status triggers-pending man-db 2.6.1-2ubuntu1
  2013-02-04 10:56:43 status half-installed debootstrap 1.0.39ubuntu0.2

  lsof -p 13902

  lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/etepsic/.gvfs
        Output information may be incomplete.
  COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
  dpkg 13902 root cwd DIR 252,2 4096 2 /
  dpkg 13902 root rtd DIR 252,2 4096 2 /
  dpkg 13902 root txt REG 252,2 252032 12846081 /usr/bin/dpkg
  dpkg 13902 root mem REG 252,2 47040 25695094 /lib/i386-linux-gnu/libnss_files-2.15.so
  dpkg 13902 root mem REG 252,2 92016 25695110 /lib/i386-linux-gnu/libnsl-2.15.so
  dpkg 13902 root mem REG 252,2 30520 25695092 /lib/i386-linux-gnu/libnss_compat-2.15.so
  dpkg 13902 root mem REG 252,2 8748544 12852732 /usr/lib/locale/locale-archive
  dpkg 13902 root mem REG 252,2 13940 25695105 /lib/i386-linux-gnu/libdl-2.15.so
  dpkg 13902 root mem REG 252,2 1730024 25695090 /lib/i386-linux-gnu/libc-2.15.so
  dpkg 13902 root mem REG 252,2 120748 25691128 /lib/i386-linux-gnu/libselinux.so.1
  dpkg 13902 root mem REG 252,2 26256 12855944 /usr/lib/i386-linux-gnu/gconv/gconv-modules.cache
  dpkg 13902 root mem REG 252,2 42652 25695098 /lib/i386-linux-gnu/libnss_nis-2.15.so
  dpkg 13902 root mem REG 252,2 134344 25695102 /lib/i386-linux-gnu/ld-2.15.so
  dpkg 13902 root 0u CHR 136,2 0t0 5 /dev/pts/2
  dpkg 13902 root 1u CHR 136,2 0t0 5 /dev/pts/2
  dpkg 13902 root 2u CHR 136,2 0t0 5 /dev/pts/2
  dpkg 13902 root 3uW REG 252,2 0 25428716 /var/lib/dpkg/lock
  dpkg 13902 root 4w REG 252,2 4608 25430065 /var/lib/dpkg/updates/tmp.i
  dpkg 13902 root 5u REG 252,2 0 25435478 /var/lib/dpkg/triggers/Lock
  dpkg 13902 root 6w REG 252,2 20567 25429224 /var/log/dpkg.log
  dpkg 13902 root 7r REG 252,2 3533 25435864 /var/lib/dpkg/diversions
  dpkg 13902 root 8r REG 252,2 135 25428717 /var/lib/dpkg/statoverride
  dpkg 13902 root 47w FIFO 0,8 0t0 394468 pipe

  I have tried uninstalling debootstrap, but dpkg reports that it cannot remove it:

  # dpkg --remove debootstrap
  dpkg: error processing debootstrap (--remove):
   Package is in a very bad inconsistent state - you should
   reinstall it before attempting a removal.
  Errors were encountered while processing:
   debootstrap
  I have tried uninstalling debootstrap, but dpkg reports that it cannot remove it.

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