The file /opt/mapr/conf/daemon.conf specifies the
user and group under which MapR services run, and whether all MapR
services run as the specified user/group, or only ZooKeeper and
FileServer. The configuration parameters operate as follows:
mapr.daemon.user and
mapr.daemon.group are set, the ZooKeeper and
FileServer run as the specified user/group. Otherwise, they run as
root.mapr.daemon.runuser.warden=1, all services
started by the warden run as the specified user. Otherwise, they
run as root.mapr.daemon.user=mapr
mapr.daemon.group=mapr
mapr.daemon.runuser.warden=1