Heartbeat doesn't start systemd services

ha.cf file:
debugfile /var/log/ha-debug
logfile /var/log/ha-log
logfacility local0
bcast bond0
keepalive 2
warntime 8
deadtime 30
initdead 30
udpport 694
auto_failback off
node cdb101
node cdb102

haresources file:
cdb101 drbddisk::mysql-drbd Filesystem::/dev/drbd0::/mysql-data::ext4 IPaddr::10.88.10.254/24/bond0 mysql MailTo::<email address hidden>

Logging:
Aug 17 20:17:56 cdb101 heartbeat: [93350]: WARN: Core dumps could be lost if multiple dumps occur.
Aug 17 20:17:56 cdb101 heartbeat: [93350]: WARN: Consider setting non-default value in /proc/sys/kernel/core_pattern (or equivalent) for maximum supportability
Aug 17 20:17:56 cdb101 heartbeat: [93350]: WARN: Consider setting /proc/sys/kernel/core_uses_pid (or equivalent) to 1 for maximum supportability
Aug 17 20:17:56 cdb101 heartbeat: [93350]: info: Pacemaker support: false
Aug 17 20:17:56 cdb101 heartbeat: [93350]: WARN: Logging daemon is disabled --enabling logging daemon is recommended
Aug 17 20:17:56 cdb101 heartbeat: [93350]: info: **************************
Aug 17 20:17:56 cdb101 heartbeat: [93350]: info: Configuration validated. Starting heartbeat 3.0.6
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: heartbeat: version 3.0.6
Aug 17 20:17:56 cdb101 heartbeat: [93351]: WARN: No Previous generation - starting at 1471461477
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: Heartbeat generation: 1471461477
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: No uuid found for current node - generating a new uuid.
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: Creating FIFO /var/lib/heartbeat/fifo.
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: glib: UDP Broadcast heartbeat started on port 694 (694) interface bond0
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: glib: UDP Broadcast heartbeat closed on port 694 interface bond0 - Status: 1
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: Local status now set to: 'up'
Aug 17 20:17:56 cdb101 heartbeat: [93351]: info: Link cdb101:bond0 up.
Aug 17 20:18:26 cdb101 heartbeat: [93351]: WARN: node cdb102: is dead
Aug 17 20:18:26 cdb101 heartbeat: [93351]: info: Comm_now_up(): updating status to active
Aug 17 20:18:26 cdb101 heartbeat: [93351]: info: Local status now set to: 'active'
Aug 17 20:18:26 cdb101 heartbeat: [93351]: WARN: No STONITH device configured.
Aug 17 20:18:26 cdb101 heartbeat: [93351]: WARN: Shared disks are not protected.
Aug 17 20:18:26 cdb101 heartbeat: [93351]: info: Resources being acquired from cdb102.
harc(default)[93481]: 2016/08/17_20:18:26 info: Running /etc/ha.d//rc.d/status status
Aug 17 20:18:26 cdb101 heartbeat: [93482]: info: Local Resource acquisition completed.
Aug 17 20:18:26 cdb101 heartbeat: [93351]: info: Initial resource acquisition complete (T_RESOURCES(us))
mach_down(default)[93515]: 2016/08/17_20:18:26 info: /usr/share/heartbeat/mach_down: nice_failback: foreign resources acquired
mach_down(default)[93515]: 2016/08/17_20:18:26 info: mach_down takeover complete for node cdb102.
Aug 17 20:18:26 cdb101 heartbeat: [93351]: info: mach_down takeover complete.
Aug 17 20:18:37 cdb101 heartbeat: [93351]: info: Local Resource acquisition completed. (none)
Aug 17 20:18:37 cdb101 heartbeat: [93351]: info: local resource tran...

n.b. same config & file permissions works on 14.04 and no relevant changes mentioned in heartbeat 3.0.6 changelog.