It does not.
On Tuesday, June 14, 2016 at 8:14:20 AM UTC-4, √ wrote:
>
> Is supervision triggering? (i.e. restarts, possibly creating new beans)?
>
> On Tue, Jun 14, 2016 at 2:03 PM, Mark Kaberman <mkab...@gmail.com
> <javascript:>> wrote:
>
>> I added the static instantiation counter to my actor Spring bean (see my
>> original post). When an actor is created via getContext().ActorOf(... I see
>> number of logging entries coming from the bean's constructor indicating
>> that n instances of the actor beans has been created where n matches
>> nr-of-instances from my Akka config. When context().child.(..).get() is
>> called, I see a single logging entry coming from bean's constructor
>> indicating that a singe actor bean has been created. My logging indicates
>> that getContext().ActorOf(.. is only called once per actor,
>> but context().child.(..).get() is called constantly (as it should). So I
>> see ever increasing counter logging indicating that more and more Spring
>> beans are created.
>>
>>
>> On Tuesday, June 14, 2016 at 7:38:37 AM UTC-4, Patrik Nordwall wrote:
>>>
>>> I'm 100% sure that the child.get method here doesn't create an actor.
>>> How do you see that?
>>>
>>> On Fri, Jun 10, 2016 at 10:43 PM, Mark Kaberman <mkab...@gmail.com>
>>> wrote:
>>>
>>>> I debugged my application and it seems to be a bug in Akka:
>>>>
>>>> My routers are defined similarly to each other as
>>>> /myActor/ {
>>>> dispatcher = my-pinned-dispatcher
>>>> router = round-robin
>>>> nr-of-instances = 10
>>>> }
>>>>
>>>> When I debug into my actor creation and messaging method
>>>>
>>>> public sendAkkaMessage(String actorBeanName, String actorRouterName,
>>>> Object message) {
>>>> ActorRef actor = null;
>>>> final scala.Option<ActorRef> child =
>>>> context().child(actorRouterName);
>>>> if (child != null && child.isDefined()) {
>>>> actor = child.get();
>>>> } else {
>>>> actor =
>>>> getContext().actorOf(SpringExtProvider.get(system).props(actorBeanName).withRouter(new
>>>>
>>>> FromConfig()), actorRouterName);
>>>> }
>>>> actor.tell(message, self());
>>>> }
>>>>
>>>> I see that when a new actor is created by calling
>>>> getContext().actorOf()... I see 10 new Spring beans being created (as per
>>>> Akka config). When an actor is created via child.get() I see one Spring
>>>> bean is created. So it seems that in the case of a get() Akka disregards
>>>> already created Spring beans and creates one more.
>>>>
>>>>
>>>>
>>>> On Friday, June 10, 2016 at 1:24:21 PM UTC-4, √ wrote:
>>>>>
>>>>> I don't know how your app works or what router config you are using so
>>>>> it is impossible for me to know what's happening.
>>>>>
>>>>> Perhaps you have Restarts happening which will create new MyActor
>>>>> instances but the old instances are still reachable by something else.
>>>>> Spring perhaps?
>>>>>
>>>>> Use a memory debugger and trace the reachability of those MyActor
>>>>> instances.
>>>>>
>>>>> --
>>>>> Cheers,
>>>>> √
>>>>> On Jun 10, 2016 6:03 PM, "Mark Kaberman" <mkab...@gmail.com> wrote:
>>>>>
>>>>>> Isn't the code:
>>>>>>
>>>>>> if (child != null && child.isDefined()) {
>>>>>> actor = child.get();
>>>>>> }
>>>>>>
>>>>>> supposed to fetch existing actor actor reference instead of creating
>>>>>> a new one?
>>>>>>
>>>>>> If I call stop() at the end of onReceive() what happens to other
>>>>>> instances of the same actor which could be processing different
>>>>>> vertices?
>>>>>> Will they be shut down as well?
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Friday, June 10, 2016 at 10:48:48 AM UTC-4, √ wrote:
>>>>>>>
>>>>>>> If you create new actors continually and never stop any of them then
>>>>>>> you have by design got a leak.
>>>>>>>
>>>>>>> --
>>>>>>> Cheers,
>>>>>>> √
>>>>>>> On Jun 10, 2016 4:35 PM, "Mark Kaberman" <mkab...@gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi Viktor,
>>>>>>>>
>>>>>>>> I never stop my actors explicitly (except as reaction to failure in
>>>>>>>> supervision strategy). All actors process the vertex data in
>>>>>>>> onReceive()
>>>>>>>> method, determine if a vertex has children, get the children actor by
>>>>>>>> calling my createActorRef, send the message to a child via tell (never
>>>>>>>> ask)
>>>>>>>> and exit onReceive.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>>
>>>>>>>> Mark
>>>>>>>>
>>>>>>>>
>>>>>>>> On Friday, June 10, 2016 at 10:27:25 AM UTC-4, √ wrote:
>>>>>>>>>
>>>>>>>>> Hi Mark,
>>>>>>>>>
>>>>>>>>> Where are you stopping your actors?
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Cheers,
>>>>>>>>> √
>>>>>>>>> On Jun 10, 2016 2:55 PM, "Mark Kaberman" <mkab...@gmail.com>
>>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>> I have Akka application which is essentially traverses a very
>>>>>>>>>> large tree where each vertex processing is done by an individual
>>>>>>>>>> actor.
>>>>>>>>>> Different kinds of vertices are processed by different actors. The
>>>>>>>>>> actors
>>>>>>>>>> are implemented as prototype Spring beans (they are derived from the
>>>>>>>>>> same
>>>>>>>>>> abstract class) and I am using Akka/Spring integration from Akka
>>>>>>>>>> Spring integration
>>>>>>>>>> <https://github.com/typesafehub/activator-akka-java-spring>. The
>>>>>>>>>> only two differences between the githib example and my code is that
>>>>>>>>>> I use
>>>>>>>>>> configuration file to configure the routers and the way I get actor
>>>>>>>>>> references.
>>>>>>>>>> Since the example only uses one actor it creates it like
>>>>>>>>>>
>>>>>>>>>> system.actorOf(SpringExtProvider.get(system).props(
>>>>>>>>>> "CountingActor"), "counter");
>>>>>>>>>>
>>>>>>>>>> My actor system is hierarchical and I create my actors differently
>>>>>>>>>>
>>>>>>>>>> public ActorRef createActorRef(String actorBeanName, String
>>>>>>>>>> actorRouterName) {
>>>>>>>>>> ActorRef actor = null;
>>>>>>>>>> final scala.Option<ActorRef> child =
>>>>>>>>>> context().child(actorRouterName);
>>>>>>>>>> if (child != null && child.isDefined()) {
>>>>>>>>>> actor = child.get();
>>>>>>>>>> } else {
>>>>>>>>>> actor =
>>>>>>>>>> getContext().actorOf(SpringExtProvider.get(system).props(actorBeanName).withRouter(new
>>>>>>>>>>
>>>>>>>>>> FromConfig()), actorRouterName);
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> When my system is running for few days it runs out of memory. I
>>>>>>>>>> ran the profiler and discovered that there is a huge number of
>>>>>>>>>> actor's
>>>>>>>>>> Spring beans being instantiated. So I instrumented my actors with
>>>>>>>>>> the
>>>>>>>>>> instance counters:
>>>>>>>>>>
>>>>>>>>>> public abstract class MyActor extends UntypedActor {
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> private static AtomicInteger instantiationCount = new
>>>>>>>>>> AtomicInteger(0);
>>>>>>>>>>
>>>>>>>>>> public MyActor() {
>>>>>>>>>> logger.info("ACTOR CREATED. Instantiation count {}",
>>>>>>>>>> instantiationCount.getAndIncrement());
>>>>>>>>>>
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>> @Override
>>>>>>>>>> protected void finalize() {
>>>>>>>>>> logger.info("ACTOR FINALIZED. Instantiation count {}",
>>>>>>>>>> instantiationCount.getAndDecrement());
>>>>>>>>>> }
>>>>>>>>>> }
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> When I run my application I see constant flow of "ACTOR CREATED"
>>>>>>>>>> log entries with ever incrementing counter with the finalize()
>>>>>>>>>> method never
>>>>>>>>>> called. Eventually after few days of running the system runs out of
>>>>>>>>>> memory.
>>>>>>>>>> I am wondering if I am doing something wrong with obtaining the
>>>>>>>>>> actor
>>>>>>>>>> references or there is some issues with Akka/Spring integration
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> >>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> >>>>>>>>>> Search the archives:
>>>>>>>>>> https://groups.google.com/group/akka-user
>>>>>>>>>> ---
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>>>>>>>>>>
>>>>>>>>> --
>>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>> >>>>>>>>>> Check the FAQ:
>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>> >>>>>>>>>> Search the archives:
>>>>>>>> https://groups.google.com/group/akka-user
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>>>>>>>>
>>>>>>> --
>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>> >>>>>>>>>> Check the FAQ:
>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>> >>>>>>>>>> Search the archives:
>>>>>> https://groups.google.com/group/akka-user
>>>>>> ---
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>>>>>>
>>>>> --
>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>> >>>>>>>>>> Check the FAQ:
>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>> >>>>>>>>>> Search the archives:
>>>> https://groups.google.com/group/akka-user
>>>> ---
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>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Patrik Nordwall
>>> Akka Tech Lead
>>> Lightbend <http://www.lightbend.com/> - Reactive apps on the JVM
>>> Twitter: @patriknw
>>>
>>> --
>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>> >>>>>>>>>> Check the FAQ:
>> http://doc.akka.io/docs/akka/current/additional/faq.html
>> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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>>
>
>
>
> --
> Cheers,
> √
>
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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