Ambari 1.5.1 is based on Apache Ambari 1.5.1 and does not require any additional Apache patches to match the Apache code base. Hortonworks’ philosophy is to provide patches only when absolutely necessary to assure the interoperability of the components. Unless you are explicitly directed by Hortonworks Support to take a patch update, Ambari 1.5.1 needs to remain at this package version level to ensure a certified and supported copy of Ambari 1.5.1.
