The article was useful and complete the JMX authentication successfully. But when I allow password authentication for Cassandra by changing the following lines in Cassandra.yaml, it stops working.

Before: 

authenticator: AllowAllAuthenticator

authorizer: AllowAllAuthorizer

After:

authenticator: PasswordAuthenticator

authorizer: CassandraAuthorizer

# Authentication backend, implementing IAuthenticator; used to identify users
# Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator,
# PasswordAuthenticator}.
#
# - AllowAllAuthenticator performs no checks - set it to disable authentication.
# - PasswordAuthenticator relies on username/password pairs to authenticate
#   users. It keeps usernames and hashed passwords in system_auth.credentials table.
#   Please increase system_auth keyspace replication factor if you use this authenticator.
# Authorization backend, implementing IAuthorizer; used to limit access/provide permissions
# Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthorizer,
# CassandraAuthorizer}.
#
# - AllowAllAuthorizer allows any action to any user - set it to disable authorization.
# - CassandraAuthorizer stores permissions in system_auth.permissions table. Please
#   increase system_auth keyspace replication factor if you use this authorizer.

The comments here suggest increasing replication factor, but I don't think that's the issue. Please suggest a blog or changes to be made to enable password authentication for Cassandra.

Thanks & Regards,

Vinayak