@Frank Kam The following error indicates that either you have OLD packages of ambari-agents installed on the host Or the ambari agent upgrade/installation was not completely successful. /resource_management/libraries/script/script.py",line 36, in from ambari_commons.constants import UPGRADE_TYPE_HOST_ORDERED ImportError: cannot import name UPGRADE_TYPE_HOST_ORDERED = . Please try to reinstall ambari-agent. This should fix any missing agent package (Specially the missing python modules). Verify if it is the correct ambari agent RPM? # rpm -qa | grep ambari
# yum reinstall ambari-agent -y .
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