With the switch to Jessie, services using service::node have started using SystemD, which keeps its own log (containing its start/stop actions and the service's stderr). Alas, these logs are not visible to people in the respective *-admin groups:
mobrovac@scb1001:~$ sudo journalctl -u changeprop We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility. [sudo] password for mobrovac:
This request extends to the following groups: citoid-admin, changeprop-admin, cxserver-admin, mathoid-admin, maps-admins, graphoid-admin, mobileapps-admin, parsoid-admin (the switch to Jessie will happen soon enough that it makes sense in this request), apertium-admins (idem), ocg-render-admins and sc-admins.