Github user zsxwing commented on the pull request:
https://github.com/apache/spark/pull/10881#issuecomment-174227960
> Thanks for the pointers @zsxwing. Makes sense to just log an error
message. Instead of throwing an exception from postMessage and logging it in
send, what if we just log the warning in postMessage directly?
If this is called from `ask`, we still need to throw the exception so that
we can notify the caller. The user may use something like
`Await.result(endpointRef.ask(...))`.
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