Hi @Jay SenSharma, Thanks for your input. I removed the other repo files and have only "ambari.repo", "HDP.repo" and "HDP-UTILS.repo" and ran the following: sudo python /usr/lib/python2.6/site-packages/ambari_agent/HostCleanup.py --silent --skip=users yum clean all ls -ltr /etc/yum.repos.d/ But , i still could not get around the following error that was there previously: File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 291, in _call raise Fail(err_msg) resource_management.core.exceptions.Fail: Execution of '/usr/bin/yum -d 0 -e 0 -y install ambari-metrics-monitor' returned 1. ERROR with rpm_check_debug vs depsolve: libkadm5clnt_mit.so.8()(64bit) is needed by krb5-workstation-1.10.3-65.el6.x86_64 libkadm5clnt_mit.so.8(kadm5clnt_mit_8_MIT)(64bit) is needed by krb5-workstation-1.10.3-65.el6.x86_64 libkadm5srv_mit.so.8()(64bit) is needed by krb5-workstation-1.10.3-65.el6.x86_64 libkadm5srv_mit.so.8(kadm5srv_mit_8_MIT)(64bit) is needed by krb5-workstation-1.10.3-65.el6.x86_64 You could try running: rpm -Va --nofiles --nodigest Your transaction was saved, rerun it with: yum load-transaction /tmp/yum_save_tx-2017-03-25-06-305zHb5j.yumtx After some googling I did the following on all hosts and i tried the CLUSTER INSTALL WIZARD from AMBARI again for Metrics Collector and Zookeeper installation on all EC2 nodes. It worked !! 🙂 [ec2-user@ip-172-31-5-78 ~]$ yum install libkadm5 Loaded plugins: amazon-id, rhui-lb, security Repo rhui-REGION-client-config-server-6 forced skip_if_unavailable=True due to: /etc/pki/rhui/cdn.redhat.com-chain.crt Repo rhui-REGION-client-config-server-6 forced skip_if_unavailable=True due to: /etc/pki/rhui/product/rhui-client-config-server-6.crt Repo rhui-REGION-client-config-server-6 forced skip_if_unavailable=True due to: /etc/pki/rhui/rhui-client-config-server-6.key Repo rhui-REGION-rhel-server-releases forced skip_if_unavailable=True due to: /etc/pki/rhui/cdn.redhat.com-chain.crt Repo rhui-REGION-rhel-server-releases forced skip_if_unavailable=True due to: /etc/pki/rhui/product/content-rhel6.crt Repo rhui-REGION-rhel-server-releases forced skip_if_unavailable=True due to: /etc/pki/rhui/content-rhel6.key Repo rhui-REGION-rhel-server-releases-optional forced skip_if_unavailable=True due to: /etc/pki/rhui/cdn.redhat.com-chain.crt Repo rhui-REGION-rhel-server-releases-optional forced skip_if_unavailable=True due to: /etc/pki/rhui/product/content-rhel6.crt Repo rhui-REGION-rhel-server-releases-optional forced skip_if_unavailable=True due to: /etc/pki/rhui/content-rhel6.key Repo rhui-REGION-rhel-server-rh-common forced skip_if_unavailable=True due to: /etc/pki/rhui/cdn.redhat.com-chain.crt Repo rhui-REGION-rhel-server-rh-common forced skip_if_unavailable=True due to: /etc/pki/rhui/product/content-rhel6.crt Repo rhui-REGION-rhel-server-rh-common forced skip_if_unavailable=True due to: /etc/pki/rhui/content-rhel6.key You need to be root to perform this command. [ec2-user@ip-172-31-5-78 ~]$ sudo yum install libkadm5 Loaded plugins: amazon-id, rhui-lb, security Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package libkadm5.x86_64 0:1.10.3-65.el6 will be installed --> Processing Dependency: krb5-libs(x86-64) = 1.10.3-65.el6 for package: libkadm5-1.10.3-65.el6.x86_64 --> Running transaction check ---> Package krb5-libs.x86_64 0:1.10.3-15.el6_5.1 will be updated --> Processing Dependency: krb5-libs = 1.10.3-15.el6_5.1 for package: krb5-workstation-1.10.3-15.el6_5.1.x86_64 ---> Package krb5-libs.x86_64 0:1.10.3-65.el6 will be an update --> Running transaction check ---> Package krb5-workstation.x86_64 0:1.10.3-15.el6_5.1 will be updated ---> Package krb5-workstation.x86_64 0:1.10.3-65.el6 will be an update --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================ Package Arch Version Repository Size ============================================================================================================================================================================ Installing: libkadm5 x86_64 1.10.3-65.el6 rhui-REGION-rhel-server-releases 143 k Updating for dependencies: krb5-libs x86_64 1.10.3-65.el6 rhui-REGION-rhel-server-releases 675 k krb5-workstation x86_64 1.10.3-65.el6 rhui-REGION-rhel-server-releases 814 k Transaction Summary ============================================================================================================================================================================ Install 1 Package(s) Upgrade 2 Package(s) Total size: 1.6 M Total download size: 143 k Is this ok [y/N]: y Downloading Packages: libkadm5-1.10.3-65.el6.x86_64.rpm | 143 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Updating : krb5-libs-1.10.3-65.el6.x86_64 1/5 Installing : libkadm5-1.10.3-65.el6.x86_64 2/5 Updating : krb5-workstation-1.10.3-65.el6.x86_64 3/5 Cleanup : krb5-workstation-1.10.3-15.el6_5.1.x86_64 4/5 Cleanup : krb5-libs-1.10.3-15.el6_5.1.x86_64 5/5 Verifying : krb5-libs-1.10.3-65.el6.x86_64 1/5 Verifying : libkadm5-1.10.3-65.el6.x86_64 2/5 Verifying : krb5-workstation-1.10.3-65.el6.x86_64 3/5 Verifying : krb5-libs-1.10.3-15.el6_5.1.x86_64 4/5 Verifying : krb5-workstation-1.10.3-15.el6_5.1.x86_64 5/5 Installed: libkadm5.x86_64 0:1.10.3-65.el6 Dependency Updated: krb5-libs.x86_64 0:1.10.3-65.el6 krb5-workstation.x86_64 0:1.10.3-65.el6 Complete! ... 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