Hi running 1.8 the cluster seems to be OK but I see these warnings in the logs...
2019-10-03 14:57:25,152 WARN akka.remote.transport.netty.NettyTransport - Remote connection to [null] failed with java.net.ConnectException: Connection refused: /xxx.xxx.xxx.65:46167 2019-10-03 14:57:25,156 WARN akka.remote.ReliableDeliverySupervisor - Association with remote system [akka.tcp://fl...@xxx.xxx.xxx.65:46167] has failed, address is now gated for [50] ms. Reason: [Association failed with [akka.tcp://fl...@xxx.xxx.xxx.65:46167]] Caused by: [Connection refused: /xxx.xxx.xxx.65:46167]