sorry I stupid flip my eyes on webSocketActor as the the self.cause the code you porting from send the PoisionPill message to self.
```
case _ => self ! PoisonPill
https://github.com/typesafehub/ReactiveMaps/blob/master/app/actors/WebSocketActor.scala#L60
```
so for now ,if you send the PosisionPill to the child actor which handler actor here,then everything will be OK and nice.thanks