java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@548c9fec[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@5238e9bb[Wrapped task = com.hazelcast.client.impl.connection.tcp.TcpClientConnectionManager$ConnectToAllClusterMembersTask@b9434da]], because client is shutting down...