Hello everyone, It seems like there is a bug in the newest Ambari version. I took this link as stated in the installation guide of Hortonworks: "wget -nv http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.6.0.0/ambari.repo -O /etc/yum.repos.d/ambari.repo", but when I changed to "wget -nv http://public-repo-1.hortonworks.com/ambari/centos7/2.x/updates/2.5.0.3/ambari.repo -O /etc/yum.repos.d/ambari.repo" the installation went through also with HDP2.6.3. Does anyone know why? But anyways now it is working :-). Best regards, Christian ... View more