After configuring JMX authentication, using jconsole requires a
username and password to complete the remote connection to the Cassandra cluster.
Use an appropriate username/password combination.
Procedure
Start jconsole using a pre-configured JMX username and
password for <username> and
<password>:
For Cassandra 3.6 and later, the username and password can be an internally
configured Cassandra role and password.
