title: Make Hadoop run as a Kerberos user
body: <p>There is a user in Kerberos named "foo", the hadoop cluster is Kerberos secured. I want the hadoop cluster to run the job as "foo", how can I do that? What is the configuration that allows a hadoop client to specify a kerberos user account name to run with, just like hadoop cluster 'kinit username' then run the mapreduce job? Just FYI, hadoop 2.6.0</p>