Upstart 'service' tool contradicts itself

I was trying to run mongodb after an install of the official packages from mongodb.org
 ( see http://docs.mongodb.org/master/tutorial/install-mongodb-on-ubuntu/?_ga=1.185710826.237376734.1439890300 )

However, when trying to run the service, it reports the job is unknown...

(trusty)cefn@localhost:~$ sudo service mongod start
[sudo] password for cefn:
start: Unknown job: mongod

However, it is even listed by the status report from the service utility, so therefore cannot be an unknown job.

(trusty)cefn@localhost:~$ service --status-all
 [ - ] acpid
 [ - ] anacron
 [ - ] apparmor
 [ ? ] apport
 [ - ] atd
 [ - ] avahi-daemon
 [ - ] bluetooth
 [ ? ] console-setup
 [ - ] cron
 [ + ] cups
 [ - ] cups-browsed
 [ - ] dbus
 [ - ] kerneloops
 [ ? ] killprocs
 [ ? ] kmod
 [ ? ] lightdm
 [ - ] lm-sensors
 [ - ] lxdm
 [ - ] mongod
 [ ? ] networking
 [ - ] nmbd
 [ - ] ntp
 [ ? ] ondemand
 [ ? ] pppd-dns
 [ - ] procps
 [ - ] pulseaudio
 [ ? ] rc.local
 [ + ] resolvconf
 [ - ] rsync
 [ - ] rsyslog
 [ - ] samba
 [ - ] samba-ad-dc
 [ + ] saned
 [ ? ] sendsigs
 [ - ] smbd
 [ - ] sudo
 [ + ] udev
 [ ? ] umountfs
 [ ? ] umountnfs.sh
 [ ? ] umountroot
 [ - ] unattended-upgrades
 [ - ] urandom
 [ - ] x11-common

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: upstart 1.12.1-0ubuntu4.2
Uname: Linux 3.10.18 x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
Date: Tue Aug 18 10:28:30 2015
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 SHELL=/bin/bash
ProcKernelCmdline: cros_secure console= loglevel=7 init=/sbin/init cros_secure oops=panic panic=-1 root=/dev/dm-0 rootwait ro dm_verity.error_behavior=3 dm_verity.max_bios=-1 dm_verity.dev_wait=1 dm="1 vroot none ro 1,0 2506752 verity payload=PARTUUID=53f1dd78-d512-d54e-ab32-e6551aaac164/PARTNROFF=1 hashtree=PARTUUID=53f1dd78-d512-d54e-ab32-e6551aaac164/PARTNROFF=1 hashstart=2506752 alg=sha1 root_hexdigest=b49ab79e9ac8c6ca7cb3af1cc56845582a004604 salt=9dd439b7d85194ada9426af268d20f887c61899ad2f2391b3a448fabb5929858" noinitrd vt.global_cursor_default=0 kern_guid=53f1dd78-d512-d54e-ab32-e6551aaac164 add_efi_memmap boot=local noresume noswap i915.modeset=1 tpm_tis.force=1 tpm_tis.interrupts=0 nmi_watchdog=panic,lapic
SourcePackage: upstart
UpgradeStatus: No upgrade log present (probably fresh install)
UpstartBugCategory: System
UpstartRunningSystemJobs:
 Error: command ['initctl', '--system', 'list'] failed with exit code 1: initctl: Name "com.ubuntu.Upstart" does not exist
UpstartRunningSystemVersion: Error: command ['initctl', '--system', 'version'] failed with exit code 1: initctl: Name "com.ubuntu.Upstart" does not exist
modified.conffile..etc.default.cups: [modified]
modified.conffile..etc.sysctl.conf: [modified]
modified.conffile..etc.upstart.xsessions: [modified]
mtime.conffile..etc.default.cups: 2015-03-20T15:17:29.993185
mtime.conffile..etc.sysctl.conf: 2015-08-09T11:50:59.391029
mtime.conffile..etc.upstart.xsessions: 2015-08-04T09:54:51.379979