Bug#814240: systemd triggers break upgrades within unstable

[Michael Biebl]

Hi Guillem,

could you have a look at this bug report, please?
Somehow this looks like an issue in dpkg, if it triggers a package which
is in an inconsistent state.

But maybe we just made a mistake in our use of triggers in systemd:
 https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/systemd.triggers
 https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/systemd.postinst#n15

In any case, your input would be very much appreciated.

Michael

Am 09.02.2016 um 14:12 schrieb Zack Weinberg:
> Package: systemd
> Version: 228-6
> Severity: normal
> 
> libpam-systemd, systemd, and libsystemd0 have = dependencies on each
> other.  This invariant can be temporarily violated in the middle of a
> large upgrade, and AIUI that is normal and to be expected.  However,
> systemd has several dpkg triggers that can fire while the = dependencies
> are violated, and when this happens, the entire upgrade bombs out.
> Worse, one of those triggers seems to be armed and immediately fired *by
> upgrading libsystemd0*, before dpkg has had a chance to upgrade systemd
> proper, so this is guaranteed to happen any time the systemd packages
> are upgraded.
> 
> It's possible to recover by manually installing the new versions of
> libpam-systemd, systemd, and libsystemd0, but there's got to be some
> way to make apt do the Right Thing, right?  (I don't really understand
> triggers.  I thought they were supposed to postpone work until the *end*
> of a large upgrade, but they seem to go off all the time in the middle.)
> 
> Example upgrade transcript:
> 
> # aptitude safe-upgrade
> [...]
> Extracting templates from packages: 100%
> Preconfiguring packages ...
> [...snip...]
> (Reading database ... 289818 files and directories currently installed.)
> Preparing to unpack .../linux-image-4.3.0-1-amd64_4.3.5-1_amd64.deb ...
> Unpacking linux-image-4.3.0-1-amd64 (4.3.5-1) over (4.3.3-7) ...
> Preparing to unpack .../archives/udev_228-6_amd64.deb ...
> Unpacking udev (228-6) over (228-5) ...
> Preparing to unpack .../libpam-systemd_228-6_amd64.deb ...
> Unpacking libpam-systemd:amd64 (228-6) over (228-5) ...
> Preparing to unpack .../libsystemd0_228-6_amd64.deb ...
> Unpacking libsystemd0:amd64 (228-6) over (228-5) ...
> Setting up libsystemd0:amd64 (228-6) ...
> Processing triggers for libc-bin (2.21-7) ...
> dpkg: dependency problems prevent processing triggers for systemd:
>  systemd depends on libsystemd0 (= 228-5); however:
>   Version of libsystemd0:amd64 on system is 228-6.
> 
> dpkg: error processing package systemd (--triggers-only):
>  dependency problems - leaving triggers unprocessed
> Processing triggers for man-db (2.7.5-1) ...
> Errors were encountered while processing:
>  systemd
> E: Sub-process /usr/bin/dpkg returned an error code (1)
> Failed to perform requested operation on package.  Trying to recover:
> Setting up libquadmath0:amd64 (5.3.1-8) ...
> Setting up linux-image-4.3.0-1-amd64 (4.3.5-1) ...
> [...snip...]
> Setting up libobjc4:amd64 (5.3.1-8) ...
> dpkg: dependency problems prevent configuration of libpam-systemd:amd64:
>  libpam-systemd:amd64 depends on systemd (= 228-6); however:
>   Version of systemd on system is 228-5.
> 
> dpkg: error processing package libpam-systemd:amd64 (--configure):
>  dependency problems - leaving unconfigured
> Setting up libx32gcc1 (1:5.3.1-8) ...
> [...snip...]
> Setting up udev (228-6) ...
> addgroup: The group `input' already exists as a system group. Exiting.
> update-initramfs: deferring update (trigger activated)
> dpkg: dependency problems prevent processing triggers for systemd:
>  systemd depends on libsystemd0 (= 228-5); however:
>   Version of libsystemd0:amd64 on system is 228-6.
> 
> dpkg: error processing package systemd (--configure):
>  dependency problems - leaving triggers unprocessed
> Setting up libx32asan2 (5.3.1-8) ...
> [..snip...]
> Processing triggers for libc-bin (2.21-7) ...
> Processing triggers for initramfs-tools (0.122) ...
> update-initramfs: Generating /boot/initrd.img-4.3.0-1-amd64
> Errors were encountered while processing:
>  libpam-systemd:amd64
>  systemd
> Press Return to continue.
> 
> # aptitude safe-upgrade
> Performing actions...
> Reading changelogs... Done
> Extracting templates from packages: 100%
> Preconfiguring packages ...
> (Reading database ... 289818 files and directories currently installed.)
> Preparing to unpack .../acl_2.2.52-3_amd64.deb ...
> Unpacking acl (2.2.52-3) over (2.2.52-2) ...
> Preparing to unpack .../libacl1_2.2.52-3_amd64.deb ...
> Unpacking libacl1:amd64 (2.2.52-3) over (2.2.52-2) ...
> Setting up libacl1:amd64 (2.2.52-3) ...
> Processing triggers for libc-bin (2.21-7) ...
> dpkg: dependency problems prevent processing triggers for systemd:
>  systemd depends on libsystemd0 (= 228-5); however:
>   Version of libsystemd0:amd64 on system is 228-6.
> 
> dpkg: error processing package systemd (--triggers-only):
>  dependency problems - leaving triggers unprocessed
> Processing triggers for man-db (2.7.5-1) ...
> Errors were encountered while processing:
>  systemd
> E: Sub-process /usr/bin/dpkg returned an error code (1)
> Failed to perform requested operation on package.  Trying to recover:
> dpkg: dependency problems prevent configuration of libpam-systemd:amd64:
>  libpam-systemd:amd64 depends on systemd (= 228-6); however:
>   Version of systemd on system is 228-5.
> 
> dpkg: error processing package libpam-systemd:amd64 (--configure):
>  dependency problems - leaving unconfigured
> dpkg: dependency problems prevent processing triggers for systemd:
>  systemd depends on libsystemd0 (= 228-5); however:
>   Version of libsystemd0:amd64 on system is 228-6.
> 
> dpkg: error processing package systemd (--configure):
>  dependency problems - leaving triggers unprocessed
> Setting up acl (2.2.52-3) ...
> Errors were encountered while processing:
>  libpam-systemd:amd64
>  systemd
> Press Return to continue.
> 
> # dpkg -i /var/cache/apt/archives/*systemd*_228-6_amd64.deb
> (Reading database ... 289815 files and directories currently installed.)
> Preparing to unpack .../libpam-systemd_228-6_amd64.deb ...
> Unpacking libpam-systemd:amd64 (228-6) over (228-6) ...
> Preparing to unpack .../libsystemd0_228-6_amd64.deb ...
> Unpacking libsystemd0:amd64 (228-6) over (228-6) ...
> Preparing to unpack .../systemd_228-6_amd64.deb ...
> Unpacking systemd (228-6) over (228-5) ...
> Preparing to unpack .../systemd-sysv_228-6_amd64.deb ...
> Unpacking systemd-sysv (228-6) over (228-5) ...
> Setting up libsystemd0:amd64 (228-6) ...
> Setting up systemd (228-6) ...
> addgroup: The group `systemd-journal' already exists as a system group. Exiting.
> Setting up systemd-sysv (228-6) ...
> Setting up libpam-systemd:amd64 (228-6) ...
> Processing triggers for man-db (2.7.5-1) ...
> Processing triggers for dbus (1.10.6-1) ...
> Processing triggers for libc-bin (2.21-7) ...



-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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