Rudder

This is because the agent does the following:

Apr 10 12:46:21 server cf-agent[25246]: CFEngine(agent) rudder Q: "...-inventory --lo": [info] FusionInventory instance: builtin - Perl instance: system
                                        Q: "...-inventory --lo": [info] running task Inventory
                                        Q: "...-inventory --lo": [info] Inventory saved in /var/rudder/tmp/inventory/server-root.ocs
Apr 10 12:46:21 server cf-agent[25246]: CFEngine(agent) rudder R: @@Inventory@@log_debug@@inventory-all@@inventory-all@@0@@inventory@@None@@2019-04-10 10:46:19+00:00##root@#
Apr 10 12:46:21 server cf-agent[25246]: CFEngine(agent) rudder R: @@Inventory@@result_success@@inventory-all@@inventory-all@@0@@inventory@@None@@2019-04-10 10:46:19+00:00##r
Apr 10 12:46:21 server cf-agent[25246]: CFEngine(agent) rudder R: @@Inventory@@log_info@@inventory-all@@inventory-all@@0@@inventory@@None@@2019-04-10 10:46:19+00:00##root@#A
Apr 10 12:46:21 server cf-agent[25246]: CFEngine(agent) rudder R: @@server-roles@@result_success@@server-roles@@server-roles-directive@@0@@Check logrotate configuration@@Non
Apr 10 12:46:21 server systemd[1]: Stopping LSB: OpenLDAP...
Apr 10 12:46:22 server rudder-slapd[25808]: [INFO] Using /etc/default/rudder-slapd for configuration
Apr 10 12:46:22 server rudder-slapd[25796]: rudder-slapd: [INFO] Using /etc/default/rudder-slapd for configuration
Apr 10 12:46:22 server rudder-slapd[25813]: [OK] virtual memory limit set to unlimited
Apr 10 12:46:22 server rudder-slapd[25796]: rudder-slapd: [OK] virtual memory limit set to unlimited
Apr 10 12:46:22 server rudder-slapd[25814]: [INFO] Halting OpenLDAP...
Apr 10 12:46:22 server rudder-slapd[25796]: rudder-slapd: [INFO] Halting OpenLDAP...
Apr 10 12:46:22 server rudder-slapd[7700]: daemon: shutdown requested and initiated.
Apr 10 12:46:22 server rudder-slapd[7700]: slapd shutdown: waiting for 0 operations/tasks to finish
Apr 10 12:46:22 server rudder-slapd[7700]: slapd stopped.
Apr 10 12:46:22 server cf-serverd[24550]: CFEngine(server) rudder Rereading policy file '/var/rudder/cfengine-community/inputs/promises.cf'

It sends the inventory, then do the server role check (and thus stop slapd and webapp, during processing of inventory)
Inventory should be sent last