title: Is Bi-direction RPC in Apache Avro Possible?
body: <p>Is it possible to do bi-directional (P2P) messaging in Apache Avro over a single connection?</p>
  
  <p>Eg, if I defined a protocol in Avro with one method PING, is it possible for the PING request to be made by both clients without establishing a second connection?</p>