learning rpc about spark core source code

[huangzheng]

Hi all 

       Recently I have learned about  1.3 spark core source code ,  can't
understand rpc,  How to communicate between client driver, worker  and
master?

  There are some scala files such as RpcCallContextRpcEndPointRef
RpcEndpoint  RpcEnv. On spark core rpc module 

  Have any blogs ?

 

Thank you very much!