Hi Viktor,
I've been constructing the paths on-the-fly in the following manner:
context.actorSelection("akka://system/user/myApp/myActor_"+instance+"_"+symbol)
! aMessage
where instance is an Int and symbol is a String, and both change as I
iterate. To date, I haven't had any issues with this approach.
Cheers,
Bruce
On Wednesday, 12 February 2014 17:09:02 UTC-5, √ wrote:
>
> Hi Bruce,
>
> Looks to be some weird use of actorSelection:
> https://github.com/akka/akka/blob/v2.2.3/akka-actor/src/main/scala/akka/actor/ActorCell.scala#L493
>
>
> On Wed, Feb 12, 2014 at 11:03 PM, Bruce <[email protected] <javascript:>>wrote:
>
>> Hi all,
>>
>> I'm hoping that someone will be able point me in the right direction,
>> given their experience on what usually causes the following error.
>> *Note*: due to a confidentiality agreement, I'm unable to post the code
>> that causes it. There doesn't seem to be any direct information in the
>> stack trace that would identify my offending code. I've gone as far as
>> testing each individual message for null prior to sending, and nothing
>> shows up. I've also tried to trap the exception with fine-grained
>> try-catch blocks, and again nothing shows up. Any ideas?
>>
>> Thanks in advance,
>> Bruce
>>
>> 2014-02-12 16:55:24,372 ERROR [system-akka.actor.default-dispatcher-16]
>> a.a.OneForOneStrategy [Slf4jLogger.scala:66] Message is null
>> akka.actor.InvalidMessageException: Message is null
>> at akka.dispatch.Envelope$.apply(AbstractDispatcher.scala:29)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.actor.Cell$class.sendMessage(ActorCell.scala:259)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.actor.ActorCell.sendMessage(ActorCell.scala:338)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.actor.LocalActorRef.$bang(ActorRef.scala:389)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.actor.ActorRef.tell(ActorRef.scala:125)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> akka.actor.ActorCell$$anonfun$autoReceiveMessage$2.apply(ActorCell.scala:493)
>>
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> akka.actor.ActorCell$$anonfun$autoReceiveMessage$2.apply(ActorCell.scala:493)
>>
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:772)
>>
>> ~[scala-library.jar:na]
>> at scala.collection.Iterator$class.foreach(Iterator.scala:727)
>> ~[scala-library.jar:na]
>> at
>> akka.util.Collections$PartialImmutableValuesIterable$$anon$1.foreach(Collections.scala:27)
>>
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> akka.util.Collections$PartialImmutableValuesIterable.foreach(Collections.scala:52)
>>
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:771)
>>
>> ~[scala-library.jar:na]
>> at akka.actor.ActorCell.autoReceiveMessage(ActorCell.scala:493)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.actor.ActorCell.invoke(ActorCell.scala:455)
>> ~[akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
>> [akka-actor_2.10-2.2.3.jar:2.2.3]
>> at akka.dispatch.Mailbox.run(Mailbox.scala:219)
>> [akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
>>
>> [akka-actor_2.10-2.2.3.jar:2.2.3]
>> at
>> scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
>> [scala-library.jar:na]
>> at
>> scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
>>
>> [scala-library.jar:na]
>> at
>> scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
>> [scala-library.jar:na]
>> at
>> scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
>>
>> [scala-library.jar:na]
>>
>> --
>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>> >>>>>>>>>> Check the FAQ: http://akka.io/faq/
>> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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>
>
>
> --
> Cheers,
> √
>
> * ——————— **Viktor Klang*
> *Chief Architect - **Typesafe <http://www.typesafe.com/>*
>
> Twitter: @viktorklang
>
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ: http://akka.io/faq/
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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