SocketFactory support for flexible RPC connections (authentication, encryption 
...)
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                 Key: HADOOP-2301
                 URL: https://issues.apache.org/jira/browse/HADOOP-2301
             Project: Hadoop
          Issue Type: New Feature
          Components: ipc
    Affects Versions: 0.16.0
            Reporter: Raghu Angadi


Currently Hadoop uses SocketFactories to support proxies for RPC connections.

HADOOP-2184 introduces a _ticket_ associated with each RPC that is transfered 
to Server with each connection. The ticket is transfered transparently to the 
user RPCs. Hadoop is expected to support other user authentication and 
encryption like Kerberos in near future. It would be nice to have Hadoop 
SocketFactory intefaces and implementations that implement different types of 
connections and data encryptions, that happens transparently to RPC layer 
itself. 

There was some discussion about this in HADOOP-2184 and will include the 
excepts in the next comment. 

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