The descriptions of the interactions below take this form.
[Protocol] message( input ) : output
The [Protocol] portion describes the protocol, authentication mechanism and identities exchanged.
Suffixes are used in many cases to denote type
tgt = Kerberos Ticket Granting Ticket
kp = Kerberos Principal: nn-kp = The Kerberos principal for the NameNode nn.
kt = Kerberos Ticket: u-jt-kt = A Kerberos Ticket for User u to access the JobTracker jt.
WARNING: Work In Progress