That depends on the supervisor strategy, funny thing that for one my 
clients with lots of legacy code I had to use a CompletableFuture because 
the framework I'm introducing there has no of ask or await.
And that's an idea you can use, send a Java's CompletableFuture to your 
actor, and in such future set either the exception or result and let the 
consumer of such failure deal with it:

https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CompletableFuture.html

HTH,

Guido.

On Thursday, June 30, 2016 at 2:52:06 PM UTC+1, kraythe wrote:
>
> Thanks for all the feedback. To be clear you seem to think my second 
> approach is the better of the two ideas and I souls just create a bunch of 
> these in a router? My only concern there is that if a single actor fails 
> requests can queue up in that actors mailbox. When the router restarts the 
> failed actor, will unprocessed messages in the mailbox be lost or will it 
> go processing as normal?

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