I'm not able to start/stop/restart services on edge servers (operations timeout). even tried to delete on of them from ambari but also not able to add it again since it hangs on the validation after registering the host as below. and error logs showing 23 Jun 2017 00:56:43,060 INFO [ambari-action-scheduler] ActionScheduler:838 - Removing command from queue, host=edge02001, commandId=261-0 23 Jun 2017 00:56:44,111 WARN [ambari-action-scheduler] ActionScheduler:811 - Host: edge02001, role: check_host, actionId: 261-0 expired and will be failed I'm using HDP 2.6 Your fast help is really appriciated ! ... View more