Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/10261#issuecomment-164037328
@vanzin
I saw your following comment in
https://github.com/vanzin/spark/commit/3848bf5e5bee4aa132aa001baab41dc58d39e5c5#diff-acd05d6d379b6ef6ccf36bd3db5614f6R69
```
Because the messages used to register workers and applications were one-way
messages, though, "receive" was used, and that information was not
available.
So now those messages are send using "ask", which looks a bit awkward but is
simpler than changing the RpcEnv API so that the client address is available
in the "receive" method.
```
But I don't get it.
The communication in master-worker, worker-driver and master-driver are
all in non-client mode. So for one-way messages, `RequestMessage.senderAddress`
is the RpcEnv listening address. If we maintain the address relation like this
PR, RpcEndpoint doesn't need to worry about the address issue even for
`one-way` messages. Right?
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