As discussed in the mailing list, we’d like to introduce Apache Kerby into Hadoop. Initially it’s good to start with upgrading Hadoop MiniKDC with Kerby offerings. Apache Kerby (https://github.com/apache/directory-kerby), as an Apache Directory sub project, is a Java Kerberos binding. It provides a SimpleKDC server that borrowed ideas from MiniKDC and implemented all the facilities existing in MiniKDC. Currently MiniKDC depends on the old Kerberos implementation in Directory Server project, but the implementation is stopped being maintained. Directory community has a plan to replace the implementation using Kerby. MiniKDC can use Kerby SimpleKDC directly to avoid depending on the full of Directory project. Kerby also provides nice identity backends such as the lightweight memory based one and the very simple json one for easy development and test environments.