java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@6b7760ef[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@49bd5b9b[Wrapped task = com.hazelcast.client.impl.connection.tcp.TcpClientConnectionManager$ConnectToAllClusterMembersTask@5eebfc2a]], because client is shutting down...