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The sequence diagrams below (after the very long Legend) are intended to be a very detailed description of the interactions that occur during the process of defining, submitting and executing a map reduce job on a secure Hadoop 2.x cluster. Different phases of the overall process are covered in each diagram. The are intended to be taken as one continuous flow with the exception of the last diagram which illustrates parallel steps that would occur during the flow.

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Abbreviation

Description

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[KRB]

Kerberos Protocol

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[RSKT:{kerberos-service-ticket}]

RPC protocol with SASL mutual authentication using Kerberos tickets.

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[RSAT:{access-token}]

RPC protocol with SASL mutual authentication using access tokens (e.g. YARN Node Manager Token).

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[RSDT:{delegation-token}]

RPC protocol with SASL mutual authentication using delegation tokens (e.g. HDFS Name Node Delegation Token).

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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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