@SSandhu  The first question is I am just wondering if you have an HDP subscription. If not sure you could independently run the below to see whether the repo URL is valid  and reachable Display enabled  HDP software repositories   # yum repolist Clean out all HDP packages and metadata from cache     # yum clean all Refresh HDP packages on your system     # yum update Reinstall AMC yum reinstall ambari-metrics-collector The above steps should help you resolve  AMC does not exist in the stack-select package      ... View more