[Bug 1868706] Re: Snapd postinst script hangs

[Balint Reczey]

@sabdfl How was dpkg started? As root systemctl should not ask for
password.

@stolowski The snapd version seems to be a git snapshot, not one from
the archive.

Marking as invalid for dpkg and systemd because nothing shows that there
would be any issue with their behaviour. Please reopen the bug against
one of them if the root cause seem to be in them.

** Changed in: systemd (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1868706

Title:
  Snapd postinst script hangs

Status in snapd:
  Triaged
Status in dpkg package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Invalid

Bug description:
  On a machine which has been tracking upgrades for a while, I am unable
  to install new versions of snapd. The install process stalls
  indefinitely. Processes running suggest this is a hang in the
  postinst:

  ~$ ps ax | grep dpkg
     2388 pts/1    Ss+    0:00 /usr/bin/dpkg --status-fd 25 --configure --pending
     2389 pts/1    S+     0:00 /bin/sh /var/lib/dpkg/info/snapd.postinst configure 2.43.3+git1.8109f8
     2875 pts/2    S+     0:00 grep --color=auto dpkg

  ~$ pstree 2388
  dpkg───snapd.postinst───systemctl───systemd-tty-ask

  ~$ ps ax | grep snapd
      732 ?        Ssl    0:00 /usr/lib/snapd/snapd
     2389 pts/1    S+     0:00 /bin/sh /var/lib/dpkg/info/snapd.postinst configure 2.43.3+git1.8109f8
     2452 pts/1    S+     0:00 /bin/systemctl start snapd.autoimport.service snapd.core-fixup.service snapd.recovery-chooser-trigger.service snapd.seeded.service snapd.service snapd.snap-repair.timer snapd.socket snapd.system-shutdown.service
     2880 pts/2    S+     0:00 grep --color=auto snapd

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