Thanks Konrad - I have an app that launches cluster members by ssh-ing into each box and running a script.
The launcher app is joining the cluster to simplify the logic of knowing when everything is up. I had a different actor system name for the launcher because it's a different app. But it's not a big deal to have it use the same actor system name. I'm probably going to move away from having the launcher join the cluster because there is a lot of log noise when the launcher app completes and leaves the cluster. Ideally you could subscribe to cluster events without actually joining the cluster, from a launching or monitoring perspective. What I'll probably do is just send an Identify to an actor that should be living after the cluster member starts successfully. -- Eric On Mon, Apr 7, 2014 at 10:23 AM, Konrad Malawski < konrad.malaw...@typesafe.com> wrote: > Hello Eric, > > Is having the same actor system name required? >> > Yes, for a cluster to converge the cluster members should have the same > actorsystem-name. > > I like to think of it as: the ActorSystem being the "universe" in which > Actors live, the cluster just allows them to live on different "planets" > (nodes) (in that abstract universe). > When you look at an actor path it also helps to reason about it - "more > left == more general". So in akka.tcp:// > ClusterSystem-A@127.0.0.1:2552/system/cluster/core/daemon, > the things that have to equal for a Cluster to be able to join another > ActorSystem are both the protocol used as well as the actorsystem-name; The > host, port, and rest of the path can (and will) differ between nodes. > > Relevant lines are: > https://github.com/akka/akka/blob/master/akka-cluster/src/main/scala/akka/cluster/ClusterDaemon.scala#L392-L397 > > I noticed we were not very explicit about this requirement in the docs... > Will try to make it more explicit! > I hope this helps though! > > PS: Do you have an use-case in mind where you might need to join > differently named actor systems into the same cluster? > -- > Cheers, > Konrad 'ktoso' Malawski > hAkker - Typesafe, Inc > > <http://www.scaladays.org/> > > -- > >>>>>>>>>> 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/XFmoSv6FNIs/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > akka-user+unsubscr...@googlegroups.com. > To post to this group, send email to akka-user@googlegroups.com. > Visit this group at http://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+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
