I think I will just go forward and start preparing the release of dbus with this fix in zesty and then backporting it to yakkety and xenial. Upstream didn't seem to officially review the fix or provide any feedback on our test results, but the fix is enough high-priority to consider including it anyway. I will of course get someone to review all this, but I suppose we'll be pushing upstream about it separately.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dbus in Ubuntu. https://bugs.launchpad.net/bugs/1591411 Title: systemd-logind must be restarted every ~1000 SSH logins to prevent a ~25 second delay Status in D-Bus: Unknown Status in systemd: Unknown Status in dbus package in Ubuntu: Confirmed Status in systemd package in Ubuntu: Fix Released Status in dbus source package in Xenial: Confirmed Status in systemd source package in Xenial: Invalid Status in dbus source package in Yakkety: Confirmed Status in systemd source package in Yakkety: Invalid Bug description: I noticed on a system that accepts large numbers of SSH connections that after awhile, SSH sessions were taking ~25 seconds to complete. Looking in /var/log/auth.log, systemd-logind starts failing with the following: Jun 10 23:55:28 test sshd[3666]: pam_unix(sshd:session): session opened for user ubuntu by (uid=0) Jun 10 23:55:28 test systemd-logind[105]: New session c1052 of user ubuntu. Jun 10 23:55:28 test systemd-logind[105]: Failed to abandon session scope: Transport endpoint is not connected Jun 10 23:55:28 test sshd[3666]: pam_systemd(sshd:session): Failed to create session: Message recipient disconnected from message bus without replying I reproduced this in an LXD container by doing something like: lxc launch ubuntu:x test lxc exec test -- login -f ubuntu ssh-import-id <whatever> Then ran a script as follows (passing in ubuntu@<container-ip>): while [ 1 ]; do (time ssh $1 "echo OK > /dev/null") 2>&1 | grep ^real >> log done In my case, after 1052 logins, the 1053rd and thereafter were taking 25+ seconds to complete. Here are some snippets from the log file: $ cat log | grep 0m0 | wc -l 1052 $ cat log | grep 0m25 | wc -l 4 $ tail -5 log real 0m0.222s real 0m25.232s real 0m25.235s real 0m25.236s real 0m25.239s ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: systemd 229-4ubuntu5 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 Date: Sat Jun 11 00:09:34 2016 MachineType: Notebook W230SS ProcEnviron: TERM=xterm-256color PATH=(custom, no user) ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-22-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash SourcePackage: systemd SystemdDelta: [EXTENDED] /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf [EXTENDED] /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf 2 overridden configuration files found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/15/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: W230SS dmi.board.vendor: Notebook dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd04/15/2014:svnNotebook:pnW230SS:pvrNotApplicable:rvnNotebook:rnW230SS:rvrNotApplicable:cvnNotebook:ct9:cvrN/A: dmi.product.name: W230SS dmi.product.version: Not Applicable dmi.sys.vendor: Notebook To manage notifications about this bug go to: https://bugs.launchpad.net/dbus/+bug/1591411/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
