public static class InternalClusterAction.JoinSeedNode$
implements DeadLetterSuppression, scala.Product, scala.Serializable
Start message of the process to join one of the seed nodes.
The node sends InitJoin to all seed nodes, which replies
with InitJoinAck. The first reply is used others are discarded.
The node sends Join command to the seed node that replied first.
If a node is uninitialized it will reply to InitJoin with