>From what version did you update? I can confirm that there is a problem when using pools with many routees (not only consistent hashing pools). May I ask what the use case is for a pool with 100k actors?
Regards, Patrik On Wed, Sep 30, 2015 at 2:01 PM, Akka Team <[email protected]> wrote: > Hi, > > This might actually be a regression, maybe some initialization code got > n^2 unintentionally, and therefore goes wild when used with a large number > of actors. I opened a ticket:https://github.com/akka/akka/issues/18613 > > -Endre > > On Tue, Sep 29, 2015 at 12:47 PM, gutzeit <[email protected]> wrote: > >> Dear list members, >> >> Recently we have upgraded to Akka 2.3.14 and I've noticed a very strange >> behaviour. >> >> Right after startup we start receiving messages on our production >> platform, and I the logs I see that it takes several minutes for actors >> start processing messages. >> Actors in question are part of routers that are defined in the following >> way: >> >> /usersRouter { >> router = consistent-hashing-pool >> nr-of-instances = 100000 >> virtual-nodes-factor = 10 >> } >> /contactsRouter { >> router = consistent-hashing-pool >> nr-of-instances = 100000 >> virtual-nodes-factor = 10 >> } >> >> Doing jstack in the period that no messages are processed, the only weird >> thing i can see is the following: >> >> java.lang.Thread.State: RUNNABLE >> at scala.collection.Iterator$class.foreach(Iterator.scala:727) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) >> at >> scala.collection.IterableLike$class.foreach(IterableLike.scala:72) >> at scala.collection.AbstractIterable.foreach(Iterable.scala:54) >> at >> scala.collection.TraversableLike$class.filter(TraversableLike.scala:263) >> at >> scala.collection.AbstractTraversable.filter(Traversable.scala:105) >> at >> scala.collection.TraversableLike$class.filterNot(TraversableLike.scala:274) >> at >> scala.collection.AbstractTraversable.filterNot(Traversable.scala:105) >> at >> akka.routing.RoutedActorCell$$anonfun$1.apply(RoutedActorCell.scala:77) >> at >> akka.routing.RoutedActorCell$$anonfun$1.apply(RoutedActorCell.scala:77) >> at >> scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:144) >> at >> scala.collection.TraversableOnce$$anonfun$foldLeft$1.apply(TraversableOnce.scala:144) >> at scala.collection.Iterator$class.foreach(Iterator.scala:727) >> at scala.collection.AbstractIterator.foreach(Iterator.scala:1157) >> at >> scala.collection.IterableLike$class.foreach(IterableLike.scala:72) >> at scala.collection.AbstractIterable.foreach(Iterable.scala:54) >> at >> scala.collection.TraversableOnce$class.foldLeft(TraversableOnce.scala:144) >> at >> scala.collection.AbstractTraversable.foldLeft(Traversable.scala:105) >> at >> akka.routing.RoutedActorCell.removeRoutees(RoutedActorCell.scala:77) >> at akka.routing.ResizablePoolCell.resize(Resizer.scala:288) >> at akka.routing.ResizablePoolCell.preSuperStart(Resizer.scala:267) >> at akka.routing.RoutedActorCell.start(RoutedActorCell.scala:123) >> at akka.routing.RoutedActorCell.start(RoutedActorCell.scala:41) >> at >> akka.actor.RepointableActorRef.point(RepointableActorRef.scala:105) >> at akka.actor.ActorCell.handleSupervise(ActorCell.scala:614) >> at akka.actor.ActorCell.supervise(ActorCell.scala:606) >> at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:463) >> at akka.actor.ActorCell.systemInvoke(ActorCell.scala:478) >> at >> akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:263) >> at akka.dispatch.Mailbox.run(Mailbox.scala:219) >> at >> akka.dispatch.ForkJoinExecutorConfigurator$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) >> >> >> After that period of "non-processing" is over, that stack trace does not >> appear anymore. >> >> My best guess is that it is somehow related to latest changes to >> consistent-hashing pool that was done lately, but then again its just a >> guess. >> >> Does anyone have any clue what is going on ? >> >> Thanks in advance for your help. >> >> -- >> >>>>>>>>>> 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 [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Akka Team > Typesafe - Reactive apps on the JVM > Blog: letitcrash.com > Twitter: @akkateam > > -- > >>>>>>>>>> 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/d/optout. > -- Patrik Nordwall Typesafe <http://typesafe.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 --- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
