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[KRB]

Kerberos Protocol

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[RSK:{kerberos-service-ticket}]

RPC protocol with SASL mutual authentication using Kerberos tickets.

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[RST:{access-token}]

RPC protocol with SASL mutual authentication using delegation tokens.

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[RSD:{delegation-token}]

RPC protocol with SASL mutual authentication using delegation tokens.

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[STP]

Shuffle data transfer protocol between ShuffleService and ReduceTask. HTTP protocol with TODO.

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[DTP]

Block data transfer protocol between the DataNode and a client. HTTP protocol with block tokens plus SHA1 hash exchange.

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tgt

Kerberos Ticket Granting Ticket

kt

Kerberos Service Ticket: u-jt-kt = A Kerberos Ticket for User u to access the JobTracker jt

kp

Kerberos Principal: nn-kp = The Kerberos principal for the NameNode nn

dt

Delegation Token: c-nn-dt = A delegation token for identity of the Client that can be presented to the NameNode.

tkn

Access Token: am-tkn = An access token that can be presented to the ApplicationMaster for access.

tkn-sk

Token Secret Key