title: How to restart Cassandra EC2 instance?
body: <p>I have Cassandra cluster on AWS. I have it only for testing purposes. Because of that I need to stop my instances and start them some other time. I deployed cluster with Datastax AMI and everything seems alright. I stoped instances in EC2 Management console and waited for 'stoped' state. After that I started them. I connected to them and Cassandra did not work. Command <code>nodetool</code> could not reach localhost:7199. Security groups on AWS allow all inbound and outbound traffic. I tried to <code>sudo service cassandra start</code>, but I got the same error. </p>
  
  <p>I need start all nodes of cluster without manual action on them. </p>