Operation Time Out Error in cqlsh console of cassandra

Question

I have a three nodes Cassandra Cluster and I have created one table which has more than 2,000,000 rows.

When I execute this (select count(*) from userdetails

Answer 1

To change the client timeout limit in Apache Cassandra, there are two techniques:

Technique 1:Modify the cqlshrc file.

Technique 2: Open the program cqlsh and modify the time specified using the client_timeout variable.

For details to accomplish please refer the link: https://playwithcassandra.wordpress.com/2015/11/05/cqlsh-increase-timeout-limit/