Ubuntu 16.04 systemd: Failed to send signal

[sliu@xxxxxxxxxxxxxx (Liu, Shuang (ADITG/ESM))]

Hi,

Does somebody has clue on the below issue?
Ubuntu 16.04, systemd 229, D-Bus 1.10.6
Thanks.

Shuang


systemd: Failed to send signal.
[ 3.137257] systemd[1]: Failed to send job remove signal for 109: Connection reset by peer
[ 3.138119] systemd[1]: run-rpc_pipefs.mount: Failed to send unit change signal for run-rpc_pipefs.mount: Transport endpoint is not connected
[ 3.138185] systemd[1]: dev-mapper-ubuntu\x2d\x2dvg\x2droot.device: Failed to send unit change signal for dev-mapper-ubuntu\x2d\x2dvg\x2droot.device: Transport endpoint is not connected
[ 3.138512] systemd[1]: run-rpc_pipefs.mount: Failed to send unit change signal for run-rpc_pipefs.mount: Transport endpoint is not connected
[ 3.142719] systemd[1]: Failed to send job remove signal for 134: Transport endpoint is not connected
[ 3.142958] systemd[1]: auth-rpcgss-module.service: Failed to send unit change signal for auth-rpcgss-module.service: Transport endpoint is not connected
[ 3.165359] systemd[1]: Failed to send job remove signal for 133: Transport endpoint is not connected
[ 3.165505] systemd[1]: proc-fs-nfsd.mount: Failed to send unit change signal for proc-fs-nfsd.mount: Transport endpoint is not connected
[ 3.165541] systemd[1]: dev-mapper-ubuntu\x2d\x2dvg\x2droot.device: Failed to send unit change signal for dev-mapper-ubuntu\x2d\x2dvg\x2droot.device: Transport endpoint is not connected
[ 3.166854] systemd[1]: Failed to send job remove signal for 66: Transport endpoint is not connected
[ 3.167072] systemd[1]: proc-fs-nfsd.mount: Failed to send unit change signal for proc-fs-nfsd.mount: Transport endpoint is not connected
[ 3.167130] systemd[1]: systemd-modules-load.service: Failed to send unit change signal for systemd-modules-load.service: Transport endpoint is not connected
[ 2.929018] systemd[1]: Failed to send job remove signal for 53: Transport endpoint is not connected
[ 2.929220] systemd[1]: systemd-random-seed.service: Failed to send unit change signal for systemd-random-seed.service: Transport endpoint is not connected
[ 3.024320] systemd[1]: sys-devices-platform-serial8250-tty-ttyS12.device: Failed to send unit change signal for sys-devices-platform-serial8250-tty-ttyS12.device: Transport endpoint is not connected
[ 3.024421] systemd[1]: dev-ttyS12.device: Failed to send unit change signal for dev-ttyS12.device: Transport endpoint is not connected
[ 3.547019] systemd[1]: proc-sys-fs-binfmt_misc.automount: Failed to send unit change signal for proc-sys-fs-binfmt_misc.automount: Connection reset by peer
[ 3.547144] systemd[1]: Failed to send job change signal for 207: Transport endpoint is not connected

How to reproduce:
1. enable debug level journal
LogLevel=debug in /etc/systemd/system.conf
2. reboot the system
3. journalctl | grep "Failed to send"

sliu at vmlxhi-094:~$ lsb_release -rd
Description: Ubuntu 16.04.4 LTS
Release: 16.04
sliu at vmlxhi-094:~$ systemctl --version
systemd 229
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN
sliu at vmlxhi-094:~$ dbus-daemon --version
D-Bus Message Bus Daemon 1.10.6
Copyright (C) 2002, 2003 Red Hat, Inc., CodeFactory AB, and others
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.