HBase is the only service I cannot start in the order in which they are listed. But starting all services in order: HDFS, YARN, MapReduce2, Hive, WebHCat, Oozie, Ganglia, Nagios, Zookeeper and finally HBase works fine. But using ‘start all’ still doesn’t work. It is only a matter of making many clicks because starting all services in that order works fine even without waiting for each service to start before starting the other. The order is kept by Ambari and it does not try to run one background operation before the previous one has finished. It would still be nice to automate this task or understand why ‘start all’ doesn’t work (maybe HDFS takes too long to start).