Jacek Lewandowski created SPARK-11326:
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             Summary: Split networking in standalone mode
                 Key: SPARK-11326
                 URL: https://issues.apache.org/jira/browse/SPARK-11326
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
            Reporter: Jacek Lewandowski


Currently, in standalone mode, all components, for all network connections need 
to use the same secure token if they want to have any security ensured. 

This ticket is intended to split the communication in standalone mode to make 
it more like in Yarn mode - application internal communication, scheduler 
internal communication and communication between the client and scheduler. 

Such refactoring will allow for the scheduler (master, workers) to use a 
distinct secret, which will remain unknown for the users. Similarly, it will 
allow for better security in applications, because each application will be 
able to use a distinct secret as well. 

By providing Kerberos based SASL authentication/encryption for connections 
between a client (Client or AppClient) and Spark Master, it will be possible to 
introduce authentication and automatic generation of digest tokens and safe 
sharing them among the application processes. 




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