java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@5596998[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@380d7916[Wrapped task = com.hazelcast.client.impl.connection.tcp.TcpClientConnectionManager$ConnectToAllClusterMembersTask@59ed92a7]], because client is shutting down...