Chamila, As you can see from the netstat/lsof output, there is nothing listening on port 9042 because Cassandra has not started yet. This is the reason you are unable to connect via cqlsh.
You need to work out first why Cassandra has not started. With regards to JVM, Oded is referring to the max heap size and new heap size you have configured. The suspicion is that you have max heap size set too low which is apparent from the heap pressure and GC pattern in the log you provided. Please provide the gist for the following so we can assist: - updated system.log - copy of output.log - cassandra-env.sh Cheers, Erick *Erick Ramirez* About Me about.me/erickramirezonline