Register coordinator fail when I use proxy-only-mode for cluster sharding

@i.na wrote:

Hello, I’m trying to use cluster sharding with proxy only mode.
I would like to run 2 node. One is only proxy mode without any entity and another for only entity.

I added below config

// for proxy only mode
akka.cluster {
    roles = ["frontend", "backend"]
    sharding = {
        role = "frontend"
    }
}
// for entity
akka.cluster {
    roles = ["frontend", "backend"]
    sharding = {
        role = "backend"
    }
}

I used ClusterSharding.get(actorSystem).startProxy in ‘frontend’ node,
and ClusterSharding.get(actorSystem).start in ‘backend’ node.

When ‘frontend’ node tell message to ‘backend’, below log is printed infinitely.

level=WARN  , logger=akka.cluster.sharding.ShardRegion, message=MyActor: Trying to register to coordinator at [ActorSelection[Anchor(akka://myapp@ip:port/), Path(/system/sharding/MyActorCoordinator/singleton/coordinator)]], but no acknowledgement. Total [1] buffered messages. [Coordinator [Member(address = akka://myapp@ip:port, status = Up)] is reachable.]

Do I need to add more config for using proxy only mode? Is there any detail reference about it?

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