Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: localhost/0:0:0:0:0:0:0:1:9042 (com.datastax.driver.core.exceptions.TransportException: [localhost/0:0:0:0:0:0:0:1:9042] Cannot connect), localhost/127.0.0.1:9042 (com.datastax.driver.core.exceptions.TransportException: [localhost/127.0.0.1:9042] Cannot connect))

at com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:233) ~[cassandra-driver-core-3.1.3.jar:na]

at com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:79) ~[cassandra-driver-core-3.1.3.jar:na]

at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:1473) ~[cassandra-driver-core-3.1.3.jar:na]

at com.datastax.driver.core.Cluster.init(Cluster.java:159) ~[cassandra-driver-core-3.1.3.jar:na

这是怎么回事啊？老师，同学们，本来好好的结果就出现个这个异常