Hi Johannes,
Thank you for looking into that.
This is really surprising finding. I cannot find anything wrong with my
code though in this regards. There is one more materializer beining
initialized, but for an endpoint that is rarely used (Swagger docs - I have
verified in the logs, that there are only a few requests per day to that
one).
implicit val materializer = ActorMaterializer()
val bindingFuture: Future[Http.ServerBinding] =
Http().bindAndHandle(routes, host, port)
bindingFuture.onFailure {
case ex: Exception =>
logger.error(s"Failed to bind to $host, $port", ex)
}
On Wed, 27 Sep 2017 at 11:39 Johannes Rudolph <
[email protected]> wrote:
> Hi Bartosz,
>
> I had a quick look into the dump. It contains >317000 StreamSupervisors,
> so creating too many materializers is really the issue. Note, that the
> materializer itself might go out of scope but the engine still stays alive
> if the materializer has not been shutdown manually.
>
> I created https://github.com/akka/akka/issues/23736 to discuss if we
> could warn if the `Materializer` reference is not referenced any more but
> the infrastructure is still alive.
>
> Johannes
>
>
>
> On Tue, Sep 26, 2017 at 1:59 PM, Bartosz Jankiewicz <
> [email protected]> wrote:
>
>> I have verified that but there are 2 places where declare the
>> materializers. Both are declared as vals. I will verify the number of
>> materializer instances on my heap-dump to confirm.
>>
>> On Tue, 26 Sep 2017 at 13:24 Johannes Rudolph <
>> [email protected]> wrote:
>>
>>> On Tue, Sep 26, 2017 at 7:18 AM, Patrik Nordwall <
>>> [email protected]> wrote:
>>>
>>>> If the names are StreamSupervisor- I think it can be that a new
>>>> Materializer is created for each request. I don’t know if that is done by
>>>> your application or by Akka Http. Does that ring any bells? Do you have any
>>>> creation of stream materializers in your code?
>>>>
>>>>
>>> Ah good point. I just assumed that it would be child actors of the
>>> supervisor since they also have that in the name but if it's the supervisor
>>> itself, creating too many Materializers could really be the cause.
>>>
>>> Johannes
>>>
>>>
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