[Bug 1642966] Re: package cups-daemon 2.1.3-4 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1

[Martin Pitt]

Till's log shows that cups.path triggers after cups got stopped:

Dec 02 10:59:15 till-x1carbon systemd[1]: cups.path: Got notified about unit deactivation.
Dec 02 10:59:15 till-x1carbon systemd[1]: cups.path: Changed running -> waiting
Dec 02 10:59:15 till-x1carbon systemd[1]: cups.socket: Changed running -> listening
[...]
Dec 02 10:59:19 till-x1carbon systemd[1]: cups.path: Got triggered.
Dec 02 10:59:19 till-x1carbon systemd[1]: cups.service: Trying to enqueue job cups.service/start/replace

and soon afterwards something stops it again:

Dec 02 10:59:29 till-x1carbon systemd[1]: cups.service: Trying to enqueue job cups.service/stop/replace
Dec 02 10:59:29 till-x1carbon systemd[1]: cups.service: Installed new job cups.service/stop as 6213
[...]
Dec 02 10:59:29 till-x1carbon systemd[1]: cups.service: Changed running -> stop-sigterm
Dec 02 10:59:29 till-x1carbon systemd[1]: Stopping CUPS Scheduler...

and then starts again:

Dec 02 10:59:30 till-x1carbon systemd[1]: cups.path: Got triggered.
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.service: Trying to enqueue job cups.service/start/replace

but cups shuts down again:

Dec 02 10:59:30 till-x1carbon systemd[1]: Child 9764 (cupsd) died (code=exited, status=0/SUCCESS
)
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.service: Child 9764 belongs to cups.service
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.service: Main process exited, code=exited, status=0/SUCCESS
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.service: Changed stop-sigterm -> dead
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.path: Got notified about unit deactivation.
Dec 02 10:59:30 till-x1carbon systemd[1]: cups.path: Changed running -> waiting

and so on, and I suppose eventually it runs into the restart limit.

Unfortunately the description of all cups.* unit is identical ("CUPS
Scheduler" so on a non-debug log it is a bit hard to see which of the
three it is when it says "Stopped". But nowhere in Till's log I see that
cups.path itself gets stopped (and neither cups.service) -- this is
clearly missing for a reliable stopping.

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https://bugs.launchpad.net/bugs/1642966

Title:
  package cups-daemon 2.1.3-4 failed to install/upgrade: subprocess new
  pre-removal script returned error exit status 1

Status in cups package in Ubuntu:
  Confirmed
Status in init-system-helpers package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  This is in xenial-proposed, please block release to -updates
  accordingly :)

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: cups-daemon 2.1.3-4
  ProcVersionSignature: Ubuntu 4.4.0-46.67-generic 4.4.24
  Uname: Linux 4.4.0-46-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CupsErrorLog:
   
  Date: Fri Nov 18 11:13:15 2016
  ErrorMessage: subprocess new pre-removal script returned error exit status 1
  InstallationDate: Installed on 2016-05-02 (200 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  Lpstat: device for mallards-officejet-pro-8600: dnssd://Officejet%20Pro%208600%20%5BD63461%5D._ipp._tcp.local/?uuid=1c852a4d-b800-1f08-abcd-d89d67d63461
  MachineType: Dell Inc. XPS 15 9550
  Papersize: a4
  PpdFiles: mallards-officejet-pro-8600: HP Officejet Pro 8600, hpcups 3.16.3
  ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-46-generic.efi.signed root=UUID=3643ef37-7cee-41b3-9387-2faa819c44db ro quiet splash vt.handoff=7
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-46-generic.efi.signed root=UUID=3643ef37-7cee-41b3-9387-2faa819c44db ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.1
   apt  1.2.15
  SourcePackage: cups
  Title: package cups-daemon 2.1.3-4 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/07/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 01.02.00
  dmi.board.name: 0N7TVV
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr01.02.00:bd04/07/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 15 9550
  dmi.sys.vendor: Dell Inc.

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