Hi Bartosz,

I can look into the heap dump. You can send it to me privately. If that's 
not possible could you post an histogram? It would be great if that could 
be filtered once for subclasses of `Actor` (which will probably be 
dominated by `ActorGraphInterpreter`) and once filtered by `GraphStage` 
which might show which streams stay open.

Johannes

On Monday, September 25, 2017 at 10:39:01 AM UTC+2, Bartosz Jankiewicz 
wrote:
>
> I have been running an app with Akka Http 1.0.9.
>
> It had only single endpoint respoding with JSON. The service returned the 
> value as future therefore I used onComlete semantics.
>
> The app was consistently running into OoM issues. Heap dump analysis has 
> led me to 1,536,693 instances of akka.actor.ActorCell. Along with 
> accompanying objects (scala.collection.immutable.RedBlackTree$BlackTree) 
>  it saturated the heap. All ActorCell objects seem to be related to 
> Akka-Streams - their names are: StreamSupervisor-xxxxxx
>
> Has anyone fallen into a similar issue?
>

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