I\'ve just started working with Cassandra (datastax), version 2.1.3 and cqlsh version 5.0.1.
Cassandra starts up fine and the cluster is operational instantly.
Got into this issue for [cqlsh 5.0.1 | Cassandra 3.11.4 | CQL spec 3.4.4 | Native protocol v4] had to set start_native_transport: true in cassandra.yaml file.
For verification,
tailf /var/log/cassandra/system.log file in one-tab cassandra.yaml sudo service cassandra restartIn logfile is shows.
INFO [main] 2019-03-15 19:53:06,156 Server.java:156 - Starting listening for CQL clients on /10.139.45.34:9042 (unencrypted)...