I performed the following steps in order to update some values in Ambari GUI we have - Ambari cluster GUI ( Version 2.5.0.3 ) lets say we want to change the parameter value ( from YARN service ) yarn.scheduler.minimum-allocation-mb : from 11776 to 11700 so we create first the following blueprint.json file as the following: ( under /tmp ) curl -u admin:admin -H "X-Requested-By: ambari" -X GET http://101.64.36.20:8080/api/v1/clusters/HDP01?format=blueprint -o /tmp/HDP01_blueprint.json we delete the existing blueprint from ambari cluster as the following: curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http://101.64.36.20:8080/api/v1/blueprints/HDP01 and finally we update the new blueprint.json back to ambari cluster as the following curl -u admin:admin -H "X-Requested-By: ambari" -X POST http://101.64.36.20:8080/api/v1/blueprints/HDP01?validate_topology=false -d @/tmp/HDP01_blueprint.json to take affect we restart the ambari server ambari-server restart we access to the ambari GUI to see the new value but the old value appears please advice what is wrong with my steps? the target of my procedure is to replace the values from the ambari cluster by reconfigure the blueprint.json file ... View more