Hi @Henry Luo, I see as per the code : https://github.com/apache/ambari/blob/trunk/ambari-server/src/main/resources/stack-hooks/before-ANY/scripts/shared_initialization.py You script is failing at "Creates users before cluster installation" step . I would suggest you skip creating group users via the below REST API : You can refer to this document to perform it via rest API : https://community.hortonworks.com/articles/63557/how-to-edit-the-cluster-envxml-entries-using-ambar.html or else can perform the same via : [root@asnaik1 scripts]# pwd /var/lib/ambari-server/resources/scripts [root@asnaik1 scripts]# python configs.py -u admin -p admin -n asnaik -l asnaik1.openstacklocal -t 8080 -a get -c cluster-env |grep -i ignore_groupsusers_create "ignore_groupsusers_create": "false", [root@asnaik1 scripts]# python configs.py -u admin -p admin -n asnaik -l asnaik1.openstacklocal -t 8080 -a set -c cluster-env -k ignore_groupsusers_create -v true 2018-08-09 04:12:14,914 INFO ### Performing "set": 2018-08-09 04:12:14,914 INFO ### new property - "ignore_groupsusers_create":"true" 2018-08-09 04:12:14,940 INFO ### on (Site:cluster-env, Tag:version1527268503510) 2018-08-09 04:12:14,953 INFO ### PUTting json into: doSet_version1533787934953155.json 2018-08-09 04:12:15,059 INFO ### NEW Site:cluster-env, Tag:version1533787934953155 [root@asnaik1 scripts]# python configs.py -u admin -p admin -n asnaik -l asnaik1.openstacklocal -t 8080 -a get -c cluster-env |grep -i ignore_groupsusers_create "ignore_groupsusers_create": "true", you can get the help from [root@asnaik1 scripts]# python configs.py --help and retry the operation. this time ambari wont be creating a elasticsearch user. Hope this helps. Please accept the answer if this helped you. ... View more