While performing Cluster setup using Ambari2.6.0 i have stuck at step 3 "Confirm hosts" The host registration shows success for both of my nodes but the additional checks is loading infinitely. Checking in the ambari-server.log it shows the below error: Also when i check my postgres db at this point select * from hosts; returns 2 rows (both my nodes) select * from clusters; returns 0 rows 01 Dec 2017 13:31:06,807 INFO [ambari-client-thread-68] Configuration:3210 - Ambari properties config file changed. 01 Dec 2017 13:31:06,807 INFO [ambari-client-thread-68] Configuration:3235 - Ambari properties config file changed. 01 Dec 2017 13:31:06,842 WARN [ambari-action-scheduler] ExecutionCommandWrapper:225 - Unable to lookup the cluster by ID; assuming that there is no cluster and therefore no configs for this execution command: Cluster not found, clusterName=clusterID=-1 01 Dec 2017 13:31:06,842 WARN [ambari-action-scheduler] ExecutionCommandWrapper:225 - Unable to lookup the cluster by ID; assuming that there is no cluster and therefore no configs for this execution command: Cluster not found, clusterName=clusterID=-1 01 Dec 2017 13:31:06,861 WARN [ambari-action-scheduler] ExecutionCommandWrapper:225 - Unable to lookup the cluster by ID; assuming that there is no cluster and therefore no configs for this execution command: Cluster not found, clusterName=clusterID=-1 01 Dec 2017 13:31:06,861 WARN [ambari-action-scheduler] ExecutionCommandWrapper:225 - Unable to lookup the cluster by ID; assuming that there is no cluster and therefore no configs for this execution command: Cluster not found, clusterName=clusterID=-1 ... View more