Thanks for sharing!
On Tue, Feb 2, 2016 at 10:39 AM, Rafał Kowalski <[email protected]>
wrote:
> Just for the reference I've found what was causing my cluster starting
> problem: a simple misconfiguration of the cluster seed-nodes. I am
> almost too ashamed to share it here but it might be useful for somebody
> one day.
>
> The problem was that I was binding the cluster nodes at start time
> (e.g. sbt "runMain com.example.BootClusterNode localhost 2551") to a
> different host name (localhost) than the one configured in the
> akka.cluster.seed-nodes (myhost).
>
> --8<---------------cut here---------------start------------->8---
> cluster {
> seed-nodes = [
> "akka.tcp://ClusterSystem@myhost:2551",
> "akka.tcp://ClusterSystem@myhost:2552"
> ]
> --8<---------------cut here---------------end--------------->8---
>
> Even though the nodes was started they couldn't of course join the
> cluster because they were talking to a different host on a different
> network interface.
>
> -> Rafał Kowalski writes:
>
> -> On Fri, 29 Jan 2016 17:40:24 +0100, Patrik Nordwall <
> [email protected]> said:
> >> Note that the leveldb journal can't really be used with Cluster
> >> Sharding, because it is a local only journal. Yes, you can play with
> >> it with one cluster node,
> >> otherwise you need to a distributed journal, such as
> akka-persistence-cassandra.
>
> > I've configured persistency using the cassandra-journal plugin. Here is
> > the relevant snippet from the configuration:
>
> > persistence {
>
> > journal {
> > max-message-batch-size = 200
> > max-confirmation-batch-size = 10000
> > max-deletion-batch-size = 10000
> > plugin = "cassandra-journal"
> > }
> > snapshot-store {
> > plugin = "cassandra-snapshot-store"
> > }
> > }
>
> > Full configuration is here: https://gist.github.com/4aa8f1e900dbbbdf3f44
>
> >> Have you tried the activator template, as a starting point?
>
> > Yes, I have and I've tried to model my application after the
> > akka-cluster-sharding-scala template. They use Akka 2.4.0 and leveldb
> > for the journal though. Do you think the persistence setting is the
> > problem? I can try to change to their leveldb settings and see what
> > happens.
>
> >> On Fri, Jan 29, 2016 at 1:36 PM, Martynas Mickevičius <
> [email protected]> wrote:
>
>
> >> Hi,
>
> >> did you configure any persistence journal plugin and have journal
> backend ready?
>
> >> For testing and playing around purposes you can use in-memory journal
> plugin by adding these two configuration lines
>
> >> # use the journal plugin provided with akka
> >> akka.persistence.journal.plugin = akka.persistence.journal.leveldb
>
> >> # use the java one
> >> akka.persistence.journal.leveldb.native = off
>
> >> and add the following library
>
> >> "org.iq80.leveldb" % "leveldb" % "0.7",
>
> >> to your dependencies to add the storage implementation itself.
>
> >> On Thu, Jan 28, 2016 at 10:50 PM, Rafał Kowalski <
> [email protected]> wrote:
>
>
> >> Hi,
>
> >> I'm exploring the wonderful world of Akka cluster and sharding at the
> >> moment. So far, I've setup just one persistent actor `PublicationActor`
> >> and I start the cluster sharding as follows:
>
> >> --8<---------------cut here---------------start------------->8---
> >> ClusterSharding(system).start(
> >> typeName = PublicationActor.shardName,
> >> entityProps = Props[PublicationActor],
> >> settings = ClusterShardingSettings(system),
> >> extractEntityId = PublicationActor.extractEntityId,
> >> extractShardId = PublicationActor.extractShardId
> >> )
> >> --8<---------------cut here---------------end--------------->8---
>
> >> For some reason, the ShardCoordinator is never started or determined and
> >> I see this message in my logs of all nodes:
>
> >> --8<---------------cut here---------------start------------->8---
> >> [WARN] [01/28/2016 21:45:37.280]
> [ClusterSystem-akka.actor.default-dispatcher-19]
> >> [akka.tcp://ClusterSystem@obelix:2551/system/sharding/pub] Trying
> >> to register to coordinator at [None], but no acknowledgement. Total
> >> [1]
> >> buffered messages.
> >> --8<---------------cut here---------------end--------------->8---
>
> >> I have two cluster `seed-nodes` set up but I haven't touched any
> >> cluster.sharding settings yet. What might be the problem here? What am
> >> I missing?
>
> >> Thanks,
> >> cheers
> >> --
> >> -rafał
>
> >> --
> >>>>>>>>>>>> Read the docs: http://akka.io/docs/
> >>>>>>>>>>>> Check the FAQ:
> http://doc.akka.io/docs/akka/current/additional/faq.html
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>
>
> >> --
> >> Martynas Mickevičius
> >> Typesafe – Reactive Apps on the JVM
>
>
> >> --
> >>>>>>>>>>>> Read the docs: http://akka.io/docs/
> >>>>>>>>>>>> Check the FAQ:
> http://doc.akka.io/docs/akka/current/additional/faq.html
> >>>>>>>>>>>> Search the archives:
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>
>
> >> --
>
>
> >> Patrik Nordwall
> >> Typesafe - 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
> >> ---
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>
> > cheers
> > --
> > -rafał
>
> > --
> >>>>>>>>>>> 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
> > ---
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>
> cheers
> --
> -rafał
>
> --
> >>>>>>>>>> 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
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>
--
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
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