Your server is not listening or accepting connections on 127.0.0.1:9042. Verify host and port information is correct
VM: 127.0.0.1:9042 JDBC URL :jdbc:cassandra://127.0.0.1:9042/quantum_cassandra Driver:cdata.jdbc.cassandra.CassandraDriver Appreciate your help on this.
This error message in Aqua Data Studio indicates that your host/port is incorrect, or your server is not listening on that port, or a firewall is blocking network access to it.
You just need to make sure your server is running correctly and no firewall is blocking your connection. Note that IP address 127.0.0.1 is a local loopback and is only accessible on the same machine and not remotely.