Error message: New incarnation of existing member is trying to join. Existing will be removed from the cluster and then new member will be allowed to join.

[Grace]

Hi all,

I was running a cluster of four nodes, one client node and three worker nodes in my testing.  

1) After which, a cluster.down(..) was issued to the client node.

2) The client node listens on

   Cluster(system).registerOnMemberRemoved{

      leaves cluster

      Does coordinated shutdown

}

The actorSytem is reset to null.

3) After which, the client node, upon receiving new requests, tries to reinitialize the actorSystem with the same port.

That's when I see one time I was testing that this message was shown and kept showing indefinitely.

New incarnation of existing member [Member(address = akka.tcp://abc@machineName:4504, status = Down)] is trying to join. Existing will be removed from the cluster and then new member will be allowed to join.

But there are also times in my testing that the client is able to connect back to the worker nodes and jobs get processed.

When I see this message, does it mean the leader node is not doing its job?

I see that there is a similar jira filed here:

https://github.com/akka/akka/issues/18368

We are using Akka 2.5.9.  

Could you advise if this is a known issue and if there is any workaround?

Thanks,

Grace

[Patrik Nordwall]

Other log messages prefixed with “Cluster Node” would probably tell what’s going on.

I’d suggest that you move the question to the new forum at http://discuss.akka.io

/Patrik

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