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 <rafal.kowal...@mac.com>
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
>
> --
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-- 
Martynas Mickevičius
Typesafe <http://typesafe.com/> – Reactive
<http://www.reactivemanifesto.org/> 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: https://groups.google.com/group/akka-user
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