I've simplified the Application to test this scenario by just printing out simple message inside the AbstractPersistentActorWithAtLeastOnceDelivery actor but with cassandra configuration inside application.conf.
After changing the persistence from the cassandra to leveldb, the system.terminate() works well. So looks like the cassandra diver is the blocking tread. Should I do anything before calling system.terminate() once I enable the cassandra configuration? Thanks, Emily On Monday, April 18, 2016 at 10:59:08 AM UTC-5, Johan Andrén wrote: > > Hi Emily, > > If an actor is blocking a thread and never returns it to the ActorSystem > cannot do much about it, and if you try to terminate the ActorSystem it > will never complete terminating. > > Blocking a thread could be actual processing that never stops or just > takes a very long time, being stuck reading or writing some blocking > resource, etc. You should be able to see what is going on by connecting to > the JVM and taking a thread dump - this should show at least one thread > having a call stack into one of your actors. > > -- > Johan Andrén > Akka Team, Lightbend Inc. > > > On Monday, April 18, 2016 at 5:53:17 PM UTC+2, Yan Pei wrote: >> >> ActorSystem.terminate() works well with certain number of actors inside >> the system. >> >> Once I increase the actor number, the system().terminate() couldn't >> terminate the system, the application just hung on there and I have to >> manually kill it. >> (running from Eclipse) >> >> From the log it's trying to: >> [DEBUG] [04/18/2016 10:44:58.530] >> [ActorSystemmainaroraid1-akka.actor.default-di >> spatcher-2] [EventStream] shutting down: StandardOutLogger started >> >> Anyone knows what's going on? >> >> Thanks very much! >> Emily >> > -- >>>>>>>>>> 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 https://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
