Questions:

   - Why not just replace 2.10 with 2.11? From the Java perspective it 
   should be transparent and irrelevant to your project *-if I understood 
   correctly, your project is in Java-*
   - Are you using Java 8? If just why not just go Akka 2.4.x?

Next week Akka 2.4.8+ (if sprint goes well I think) will get a new juice, 
akka-artery which will replace the current Netty basically giving you a 
much faster remote component.
The automatic ID strategy is only available for akka-kryo 0.4.1+ which uses 
2.11, automatic was the name we came up for default + incremental, 
basically to allow the developer to:

   - Register classes explicitly, for the ones registered manual 
   performance will be better.
   - Register classes automatically not listed.

HTH,

Guido.

On Sunday, July 3, 2016 at 10:39:50 PM UTC+1, Eduardo Fernandes wrote:
>
> Hi All.
>
> I'm using akka-kryo-serialization_2.10 with incremental strategy. I'm 
> using 2.10 for everything so maybe I should update in a near future. 
>
> I'm getting the error below.
>
> Anyway, after tunning kryo to work with my project, I never will get more 
> cpu's working in my bench so I'm afraid that I'll reach kryo limits quite 
> soon. 
>
> To fully adapt kryo to our project maybe I need to include it in a sprint. 
> I have a considerable number of serializable classes.
>
> Thanks again for your time.
>
> ---------------------
>
> Serialization trace:
> callbacks 
> (com.appgree.core.objectserver.providers.akka.client.ResponseImpl)
> response 
> (com.appgree.core.objectserver.providers.akka.commands.CommandRequest)
> commands 
> (com.appgree.core.objectserver.providers.akka.commands.CommandBulkRequest)
> at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125)
> at 
> com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:682)
> at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106)
> at 
> com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readObjectOrNull(Kryo.java:737)
> at 
> com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.read(DefaultArraySerializers.java:368)
> at 
> com.esotericsoftware.kryo.serializers.DefaultArraySerializers$ObjectArraySerializer.read(DefaultArraySerializers.java:289)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:682)
> at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106)
> at 
> com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:660)
> at 
> com.romix.akka.serialization.kryo.KryoBasedSerializer.fromBinary(KryoSerializer.scala:397)
> at 
> com.romix.akka.serialization.kryo.KryoSerializer.fromBinary(KryoSerializer.scala:239)
> at 
> akka.serialization.Serialization$$anonfun$deserialize$1.apply(Serialization.scala:104)
> at scala.util.Try$.apply(Try.scala:161)
> at akka.serialization.Serialization.deserialize(Serialization.scala:98)
> at akka.remote.MessageSerializer$.deserialize(MessageSerializer.scala:23)
> at 
> akka.remote.DefaultMessageDispatcher.payload$lzycompute$1(Endpoint.scala:58)
> at akka.remote.DefaultMessageDispatcher.payload$1(Endpoint.scala:58)
> at akka.remote.DefaultMessageDispatcher.dispatch(Endpoint.scala:76)
> at 
> akka.remote.EndpointReader$$anonfun$receive$2.applyOrElse(Endpoint.scala:929)
> at akka.actor.Actor$class.aroundReceive(Actor.scala:467)
> at akka.remote.EndpointActor.aroundReceive(Endpoint.scala:405)
> at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
> at akka.actor.ActorCell.invoke(ActorCell.scala:487)
> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
> at akka.dispatch.Mailbox.run(Mailbox.scala:220)
> at 
> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
> at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
> at 
> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
> at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
> at 
> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
> Caused by: java.lang.NullPointerException
> at java.util.ArrayList.ensureExplicitCapacity(Unknown Source)
> at java.util.ArrayList.ensureCapacity(Unknown Source)
> at 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:96)
> at 
> com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:682)
> at 
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106)
> ... 32 more
>
> On Sun, Jul 3, 2016 at 3:43 PM, Eduardo Fernandes <edu...@gmail.com 
> <javascript:>> wrote:
>
>> Ok. Thanks again. 
>>
>> I'll give it a try. I have to adapt our code a bit. 
>>
>> Thanks for your time on this. 
>>
>> El 3 jul 2016, a las 15:14, Guido Medina <oxy...@gmail.com <javascript:>> 
>> escribió:
>>
>> *Correction:*
>>
>>    - Kryo offers a pool that you can use if you use Kryo directly, kind 
>>    of the recommended way of using it.
>>    - Akka Kryo uses a similar model giving you the choice of using your 
>>    own queue implementation for its internal pool of instances, each 
>> instance 
>>    is an Akka serializer with its Kryo plus other things.
>>
>> You can see the relevant Akka Kryo code for the pool in this commit/diff: 
>> https://github.com/romix/akka-kryo-serialization/commit/045cd27dfd01c2c41ab7c64bf6e25a63b3fd8e42
>>
>> Guido.
>>
>> On Sunday, July 3, 2016 at 1:47:45 PM UTC+1, Guido Medina wrote:
>>>
>>> Kryo and Akka Kryo don't use any threads, the remote-dispatcher is the 
>>> one doing the work,
>>> and Netty threads sending/receiving the bytes from/to Akka remote 
>>> dispatcher as far as I can tell.
>>>
>>> Both Kryo and Akka Kryo have a pool with Kryo instances which also 
>>> happens to re-use the byte buffer making it very efficient in regards of GC.
>>>
>>> Kryo pool by default uses a Java ConcurrentQueue (I contributed some of 
>>> it to Akka Kryo extension) which you can change.
>>> Read the section, KryoQueueBuilder:
>>>
>>>
>>> https://github.com/romix/akka-kryo-serialization#kryo-queue-builder-examples
>>>
>>> which will also improve even further the GC collection.
>>>
>>> HTH,
>>>
>>> Guido.
>>>
>>> On Sunday, July 3, 2016 at 1:28:46 PM UTC+1, Eduardo Fernandes wrote:
>>>>
>>>> Quite clean. Many thanks Guido! I'll try it out. I have to inventory my 
>>>> classes so it will take a while. I hope I'll have some numbers this night. 
>>>>
>>>> Anyway, kryo will scale vertically, I suppose. Will kryo use more 
>>>> threads than I'm using right now?
>>>>
>>>> Thanks again for your help and knowledge. 
>>>>
>>>> On Sun, Jul 3, 2016 at 2:13 PM, Guido Medina <oxy...@gmail.com> wrote:
>>>>
>>>>> I meant to say *"anything that implements Serializable"*
>>>>> The classes list is important as Kryo won't write class names on the 
>>>>> messages but IDs of the classes:
>>>>>
>>>>> classes = [
>>>>>   "com.mypackage.Class1",
>>>>>   "com.mypackage.Class2"
>>>>> ]
>>>>>
>>>>> Suffice to say every node of the cluster must have the same IDs so 
>>>>> that's some sort of configuration you agree upon.
>>>>> I find convenient to have a package in a "common" jar project with all 
>>>>> the classes that I'm going to share (Serialize-ables)
>>>>> and a "common.conf" with Akka configuration, as I can build my final 
>>>>> configuration by putting together Akka configurations,
>>>>> even using place holders, like this:
>>>>>
>>>>> config = parseFile(new File(configPath)).withFallback(parseResources(
>>>>> "common.conf"))...resolve();
>>>>>
>>>>> You can use that fallback call as many times as you wish and it won't 
>>>>> to resolve place holders until you don't call resolve()
>>>>>
>>>>> HTH,
>>>>>
>>>>> Guido.
>>>>>
>>>>>
>>>>> On Sunday, July 3, 2016 at 12:57:21 PM UTC+1, Guido Medina wrote:
>>>>>>
>>>>>> I have mimic-ed your configuration and corrected some errors, also 
>>>>>> added Kryo if you want to give it a chance with the configuration I 
>>>>>> believe 
>>>>>> will do best.
>>>>>> I default the "java" serializer to Kryo, that way, everything that 
>>>>>> inherits "Serializable" will use Kryo, also, I list every class that I 
>>>>>> care 
>>>>>> (performance wise) under Kryo list.
>>>>>>
>>>>>> Hope this give you better result, also, don't underestimate the the 
>>>>>> default mailbox you have commented out:
>>>>>>
>>>>>> akka {
>>>>>>   extensions = 
>>>>>> ["com.romix.akka.serialization.kryo.KryoSerializationExtension$"]
>>>>>>
>>>>>>   actor {
>>>>>>     provider = "akka.cluster.ClusterActorRefProvider"
>>>>>>     serializers.java = 
>>>>>> "com.romix.akka.serialization.kryo.KryoSerializer"
>>>>>>     default-mailbox.mailbox-type = 
>>>>>> "akka.dispatch.SingleConsumerOnlyUnboundedMailbox"
>>>>>>
>>>>>>     default-dispatcher {
>>>>>>       type = Dispatcher
>>>>>>       executor = "fork-join-executor"
>>>>>>
>>>>>>       fork-join-executor {
>>>>>>         parallelism-min = 4
>>>>>>         parallelism-factor = 1
>>>>>>         parallelism-max = 8
>>>>>>       }
>>>>>>     }
>>>>>>
>>>>>>     kryo {
>>>>>>       kryo-reference-map = false
>>>>>>       idstrategy = "automatic"
>>>>>>       use-manifests = true
>>>>>>       buffer-size = 1024
>>>>>>       type = "nograph"
>>>>>>
>>>>>>       classes = [
>>>>>>         "com.mypackage.Class1",
>>>>>>         "com.mypackage.Class2"
>>>>>>       ]
>>>>>>     }
>>>>>>   }
>>>>>>
>>>>>>   remote {
>>>>>>     log-remote-lifecycle-events = off
>>>>>>
>>>>>>     netty.tcp {
>>>>>>
>>>>>>       server-socket-worker-pool {
>>>>>>         pool-size-min = 4
>>>>>>         pool-size-factor = 1
>>>>>>         pool-size-max = 8
>>>>>>       }
>>>>>>
>>>>>>       client-socket-worker-pool {
>>>>>>         pool-size-min = 4
>>>>>>         pool-size-factor = 1
>>>>>>         pool-size-max = 8
>>>>>>       }
>>>>>>     }
>>>>>>
>>>>>>     default-remote-dispatcher {
>>>>>>       type = Dispatcher
>>>>>>       executor = "fork-join-executor"
>>>>>>
>>>>>>       fork-join-executor {
>>>>>>         parallelism-min = 4
>>>>>>         parallelism-factor = 1
>>>>>>         parallelism-max = 8
>>>>>>       }
>>>>>>     }
>>>>>>   }
>>>>>>
>>>>>>   cluster {
>>>>>>     metrics.enabled = off
>>>>>>     jmx.enabled = off
>>>>>>   }
>>>>>> }
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sunday, July 3, 2016 at 12:45:57 PM UTC+1, Eduardo Fernandes wrote:
>>>>>>>
>>>>>>> I'm using the configuration below, following Guido suggestions. 
>>>>>>>
>>>>>>> Anyway, everything behaves like Akka/netty add more communication 
>>>>>>> threads only if a add more endpoints. Adding more actores talking from 
>>>>>>> host 
>>>>>>> 1 to host 2 is not improving throughput, despite of the available idle 
>>>>>>> cpu's.  Does this make sense?
>>>>>>>
>>>>>>> Of course if my processing were not only dedicated to echo back some 
>>>>>>> characters the processing cpu would hide the serialization performance. 
>>>>>>> It 
>>>>>>> just for find the maximum throughput (net performance) of a couple of 
>>>>>>> actorsystem's. 
>>>>>>>
>>>>>>> My topology is (attached file). Each client process has 10.000 
>>>>>>> internal sync clients and uses a single thread to dispatch messages. A 
>>>>>>> single client reaches around 450.000/s and two reaches around 
>>>>>>> 525.000/s. 
>>>>>>> Each client talks to a particular actor in host 2 which talks to a 
>>>>>>> particular actor in host 3.
>>>>>>>
>>>>>>> Again, many thanks for your help.
>>>>>>>
>>>>>>> Best regards.
>>>>>>>
>>>>>>>
>>>>>>> [image: Inline image 1]
>>>>>>>
>>>>>>>
>>>>>>> Again, many thanks for your help. 
>>>>>>>
>>>>>>>   actor {
>>>>>>>     provider = "akka.cluster.ClusterActorRefProvider"
>>>>>>>     default-dispatcher {
>>>>>>>       throughput = 1024
>>>>>>>  fork-join-executor {
>>>>>>> parallelism-min = 6
>>>>>>> parallelism-factor = 1
>>>>>>> parallelism-max = 8
>>>>>>>       }
>>>>>>>     }
>>>>>>>
>>>>>>> # default-mailbox {
>>>>>>> #      mailbox-type = 
>>>>>>> "akka.dispatch.SingleConsumerOnlyUnboundedMailbox"
>>>>>>> #    }
>>>>>>>
>>>>>>>   }
>>>>>>>   remote {
>>>>>>>     log-remote-lifecycle-events = off
>>>>>>>     netty.tcp {
>>>>>>>       tcp-nodelay = on
>>>>>>>       write-buffer-high-water-mark = 40000000b
>>>>>>>       write-buffer-low-water-mark = 0b
>>>>>>>       send-buffer-size = 40000000b
>>>>>>>       receive-buffer-size = 40000000b
>>>>>>>
>>>>>>>  server-socket-worker-pool {
>>>>>>>         pool-size-min = 4
>>>>>>> pool-size-factor = 1
>>>>>>> pool-size-max = 8
>>>>>>>  }
>>>>>>>
>>>>>>>  client-socket-worker-pool {
>>>>>>> pool-size-min = 4
>>>>>>> pool-size-factor = 1
>>>>>>> pool-size-max = 8
>>>>>>>  }
>>>>>>>     }
>>>>>>>   }
>>>>>>>
>>>>>>>
>>>>>>> On Sun, Jul 3, 2016 at 1:05 PM, Roland Kuhn <goo...@rkuhn.info> 
>>>>>>> wrote:
>>>>>>>
>>>>>>>> Doesn't the classical remoting perform serialization within the 
>>>>>>>> single actor responsible for each connection?
>>>>>>>>
>>>>>>>> Sent from my iPhone
>>>>>>>>
>>>>>>>> On 03 Jul 2016, at 12:57, Viktor Klang <viktor...@gmail.com> wrote:
>>>>>>>>
>>>>>>>> Eduardo, are you sure that there aren't any synchronized-blocks or 
>>>>>>>> locks used? (i.e. is this a contention problem rather than a 
>>>>>>>> paralellization problem?)
>>>>>>>>
>>>>>>>> On Sun, Jul 3, 2016 at 12:28 PM, Eduardo Fernandes <
>>>>>>>> edu...@gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Ups... sorry for misunderstanding your question. 
>>>>>>>>>
>>>>>>>>> My principal problem is not the overhead itself. My problem is 
>>>>>>>>> that I can't get more threads serializing objects to a node. Example: 
>>>>>>>>> one 
>>>>>>>>> client I have 30%, lets say. If I add other client talking to other 
>>>>>>>>> actor 
>>>>>>>>> instance in parallel I would expect around 60% cpu usage in my server 
>>>>>>>>> (I 
>>>>>>>>> have 6 threads minimum and I'm pretty sure that the configuration 
>>>>>>>>> would 
>>>>>>>>> enable that from workers and netty perspective).  Nevertheless I get 
>>>>>>>>> around 
>>>>>>>>> 40% of my 8 cores machine working. If I put the actors in different 
>>>>>>>>> processes I get the 60% I was expecting. When I say server I mean an 
>>>>>>>>> actorsystem process (a single java process). 
>>>>>>>>>
>>>>>>>>> Thanks again for your help.
>>>>>>>>>
>>>>>>>>> On Sun, Jul 3, 2016 at 11:55 AM, Viktor Klang <viktor...@gmail.com
>>>>>>>>> > wrote:
>>>>>>>>>
>>>>>>>>>> Hi Eduardo,
>>>>>>>>>>
>>>>>>>>>> I meant the overhead of the Java Serialization envelope.
>>>>>>>>>>
>>>>>>>>>> On Sat, Jul 2, 2016 at 10:12 PM, Eduardo Fernandes <
>>>>>>>>>> edu...@gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> Hi Viktor.
>>>>>>>>>>>
>>>>>>>>>>> I'm using basic (binary) serialization of basic Java types (int, 
>>>>>>>>>>> String (UTF), long, arrays of basic types, etc...). 
>>>>>>>>>>>
>>>>>>>>>>> The overhead is that depending of internal values there is no 
>>>>>>>>>>> send to serialize some members and other not. If you merge your 
>>>>>>>>>>> functional 
>>>>>>>>>>> logic with the serialization you can make optimizations that a 
>>>>>>>>>>> generic 
>>>>>>>>>>> serializar can't do. Example. Suppose that if a member A has a null 
>>>>>>>>>>> value 
>>>>>>>>>>> you don't have to serialize other member B. Maybe the member B you 
>>>>>>>>>>> don't 
>>>>>>>>>>> have to serialize could have a null value which is fast to 
>>>>>>>>>>> serialize but it 
>>>>>>>>>>> is even faster you don't have even to serialize the null. This type 
>>>>>>>>>>> of 
>>>>>>>>>>> overhead is only possible if the serializer knows about your 
>>>>>>>>>>> functional 
>>>>>>>>>>> logic. 
>>>>>>>>>>>
>>>>>>>>>>> Regards 
>>>>>>>>>>>
>>>>>>>>>>> On Sat, Jul 2, 2016 at 10:05 PM, Viktor Klang <
>>>>>>>>>>> viktor...@gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Hi Eduardo,
>>>>>>>>>>>>
>>>>>>>>>>>> Perhaps I misunderstood, what serialization format are you 
>>>>>>>>>>>> emitting in your readObject/writeObject?
>>>>>>>>>>>> What overhead are you observing compared to using a custom 
>>>>>>>>>>>> Serializer?
>>>>>>>>>>>>
>>>>>>>>>>>> On Sat, Jul 2, 2016 at 10:02 PM, Eduardo Fernandes <
>>>>>>>>>>>> edu...@gmail.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Hi.
>>>>>>>>>>>>>
>>>>>>>>>>>>> If you have writeObject/readObject defined in your class the 
>>>>>>>>>>>>> Java plain serialization will invoke those methods. In my case 
>>>>>>>>>>>>> all my 
>>>>>>>>>>>>> internal members and class references are also serialized using 
>>>>>>>>>>>>> the very 
>>>>>>>>>>>>> same technique. So this is equivalent to technologies like kryo 
>>>>>>>>>>>>> and 
>>>>>>>>>>>>> similars since there is no overhead if you serialize basic 
>>>>>>>>>>>>> members. In 
>>>>>>>>>>>>> other words the pre-compiles classes you get from kryo are 
>>>>>>>>>>>>> already made so 
>>>>>>>>>>>>> there is no performance enhancement in this case. The big 
>>>>>>>>>>>>> advantage of kryo 
>>>>>>>>>>>>> is that you don't have to create the writeObject/readObject by 
>>>>>>>>>>>>> yourself. In 
>>>>>>>>>>>>> my particular case I've already done that job and my 
>>>>>>>>>>>>> serialization is 
>>>>>>>>>>>>> optimized in particular cases where I don't have to serialize all 
>>>>>>>>>>>>> members 
>>>>>>>>>>>>> depending of my semantic. I've made some tests and doing this way 
>>>>>>>>>>>>> is faster 
>>>>>>>>>>>>> than kryo but you have to burn some calories implementing a 
>>>>>>>>>>>>> optimized 
>>>>>>>>>>>>> serialization code. 
>>>>>>>>>>>>>
>>>>>>>>>>>>> Bests regards and thanks for your comment.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Sat, Jul 2, 2016 at 9:27 PM, Viktor Klang <
>>>>>>>>>>>>> viktor...@gmail.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> I'm not sure I understand why write/readObject special 
>>>>>>>>>>>>>> methods would necessarily be faster? Most of the waste of Java 
>>>>>>>>>>>>>> Serialization is its envelopes and using class names etc.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Sat, Jul 2, 2016 at 1:14 AM, Eduardo Fernandes <
>>>>>>>>>>>>>> edu...@gmail.com> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I'm using Akka 2.3.13, Java edition.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I'm making some performance tests and in the same machine 
>>>>>>>>>>>>>>> with 8 cores I see that the serialization process is my 
>>>>>>>>>>>>>>> bottleneck.  I know 
>>>>>>>>>>>>>>> that because after an increment of actor cpu usage the 
>>>>>>>>>>>>>>> throughput is 
>>>>>>>>>>>>>>> exactly the same. 
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> My actor system talks to 2 other nodes so I see 2 cores 
>>>>>>>>>>>>>>> dedicated to serialization. Is is possible to increase the 
>>>>>>>>>>>>>>> number of 
>>>>>>>>>>>>>>> threads for serialization?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> I'm using standard Java serialization but I have my own 
>>>>>>>>>>>>>>> serialization implementation in my write/readObject methods so 
>>>>>>>>>>>>>>> I think that 
>>>>>>>>>>>>>>> switching to kryo or similar will not enhance too much the 
>>>>>>>>>>>>>>> throughput. 
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Many thanks for your help.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> /Eduardo
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> -- 
>>>>>>>>>>>>>>> >>>>>>>>>> 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
>>>>>>>>>>>>>>> --- 
>>>>>>>>>>>>>>> You received this message because you are subscribed to the 
>>>>>>>>>>>>>>> Google Groups "Akka User List" group.
>>>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails 
>>>>>>>>>>>>>>> from it, send an email to akka-user+...@googlegroups.com.
>>>>>>>>>>>>>>> To post to this group, send email to 
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>>>>>>>>>>>>>>> Visit this group at 
>>>>>>>>>>>>>>> https://groups.google.com/group/akka-user.
>>>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> -- 
>>>>>>>>>>>>>> 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
>>>>>>>>>>>>>> --- 
>>>>>>>>>>>>>> You received this message because you are subscribed to a 
>>>>>>>>>>>>>> topic in the Google Groups "Akka User List" group.
>>>>>>>>>>>>>> To unsubscribe from this topic, visit 
>>>>>>>>>>>>>> https://groups.google.com/d/topic/akka-user/EVsIxMEDKeI/unsubscribe
>>>>>>>>>>>>>> .
>>>>>>>>>>>>>> To unsubscribe from this group and all its topics, send an 
>>>>>>>>>>>>>> email to akka-user+...@googlegroups.com.
>>>>>>>>>>>>>> To post to this group, send email to akka...@googlegroups.com
>>>>>>>>>>>>>> .
>>>>>>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user
>>>>>>>>>>>>>> .
>>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> -- 
>>>>>>>>>>>>> >>>>>>>>>> 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
>>>>>>>>>>>>> --- 
>>>>>>>>>>>>> You received this message because you are subscribed to the 
>>>>>>>>>>>>> Google Groups "Akka User List" group.
>>>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from 
>>>>>>>>>>>>> it, send an email to akka-user+...@googlegroups.com.
>>>>>>>>>>>>> To post to this group, send email to akka...@googlegroups.com.
>>>>>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user.
>>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> -- 
>>>>>>>>>>>> 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
>>>>>>>>>>>> --- 
>>>>>>>>>>>> You received this message because you are subscribed to a topic 
>>>>>>>>>>>> in the Google Groups "Akka User List" group.
>>>>>>>>>>>> To unsubscribe from this topic, visit 
>>>>>>>>>>>> https://groups.google.com/d/topic/akka-user/EVsIxMEDKeI/unsubscribe
>>>>>>>>>>>> .
>>>>>>>>>>>> To unsubscribe from this group and all its topics, send an 
>>>>>>>>>>>> email to akka-user+...@googlegroups.com.
>>>>>>>>>>>> To post to this group, send email to akka...@googlegroups.com.
>>>>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user.
>>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> -- 
>>>>>>>>>>> >>>>>>>>>> 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
>>>>>>>>>>> --- 
>>>>>>>>>>> You received this message because you are subscribed to the 
>>>>>>>>>>> Google Groups "Akka User List" group.
>>>>>>>>>>> To unsubscribe from this group and stop receiving emails from 
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>>>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user.
>>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> -- 
>>>>>>>>>> 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
>>>>>>>>>> --- 
>>>>>>>>>> You received this message because you are subscribed to a topic 
>>>>>>>>>> in the Google Groups "Akka User List" group.
>>>>>>>>>> To unsubscribe from this topic, visit 
>>>>>>>>>> https://groups.google.com/d/topic/akka-user/EVsIxMEDKeI/unsubscribe
>>>>>>>>>> .
>>>>>>>>>> To unsubscribe from this group and all its topics, send an email 
>>>>>>>>>> to akka-user+...@googlegroups.com.
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>>>>>>>>>> Visit this group at https://groups.google.com/group/akka-user.
>>>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> -- 
>>>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>> >>>>>>>>>> Check the FAQ: 
>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>> >>>>>>>>>> Search the archives: <a href="
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