Ok Thanks so much I try to do it Il 30/nov/2016 19:01, "Robie Basak" <1642...@bugs.launchpad.net> ha scritto:
> I think this might be caused by an interesting interaction between > systemd, debhelper and the CUPS scheduler. > > I can reproduce a very similar error with the following. I think (though > am not sure) that this is related to the root cause. On a fresh Xenial > system: > > sudo apt-get update && sudo apt-get -y install cups > sudo -i > systemctl stop cups.service > sleep 4 > touch /var/cache/cups/org.cups.cupsd > sleep 4 > sudo rm /var/cache/cups/org.cups.cupsd > sleep 4 > systemctl stop cups.service > > (the sleeps are to avoid any unknown, additional and unintentional race > conditions) > > This results in an exit status of 1 and the message "Job for > cups.service canceled." which matches the error that reporters have been > seeing. > > In other words, if cups.service is started via cups.path, that cause is > removed, and then we request a manual stop of cups.service, then systemd > refuses to stop the service the first time (a retry always succeeds for > me). > > In cups-daemon.prerm, debhelper has added "deb-systemd-invoke stop > cups.path" followed by "invoke-rc.d cups stop || exit $?". I believe the > second invocation is ultimately equivalent to "systemctl stop > cups.service" and fails the same way as in my example, causing the prerm > to exit 1, causing the dpkg failure reported. > > I'm not sure of the intended logic for /lib/systemd/system/cups.path > here. AFAICT, it exists because when using CUPS with launchd, the CUPS > daemon leaves the file in place as long as it doesn't want to be > terminated, and removes it when it wants to be terminated before it > exits anyway. Is this because launchd kills daemons itself unless the > keepalive file exists? > > With systemd, I can't find any documentation that suggests that systemd > ever intends to automatically kill a socket activated daemon. AFAICT, > it's entirely up to the daemon when it chooses to exit. So there appears > to be no need for cupsd to maintain /var/cache/cups/org.cups.cupsd when > running under systemd. > > As configured right now, systemd will also start cupsd if > /var/cache/cups/org.cups.cupsd is created while cupsd is not running. I > can't find anything that might use this function. So either this is an > accidental side-effect that is not needed, or I have missed some other > path that does need this. > > systemd talks about CUPS in a blog post that is relevant: > http://0pointer.de/blog/projects/socket-activation2.html. Note that this > only sets up a path unit for /var/spool/cups, not any kind of keepalive > file for cupsd. > > -- > You received this bug notification because you are subscribed to a > duplicate bug report (1644526). > 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 > > 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. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1642966/+subscriptions > -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. 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 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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