Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/6457#issuecomment-141052175
> If you're using an external shuffle service, there should be no need for
executors to listen for incoming connections, right?
Do you mean using RpcEnv in the external shuffle service? The shuffle
service cannot use it since it doesn't depend on `core` now.
However this is a good point. Some module may not need to listen for
connections during the initialization. We can add a public `start` method to
`RpcEnv` after removing Akka.
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