Can I run upgrade sstables on many nodes on one time

Hi all, I'm trying to update my 6 node cluster from 2.0.11 to 2.1.8. I'm following this update procedure: http://docs.datastax.com/en/upgrade/doc/upgrade/cassandra/upgradeCassandraDetails.html and the point 8 says: "If you are upgrading from a major version (for example, from Cassandra 1.2 to 2.0)

Random NoHostAvailableException using DataStax Java driver

Hi All :) I have an application which use DataStax Java driver v2.0.2 to connect to Cassandra Cluster (6 nodes, v 2.0.11). Application is deployed in three copies on 3 different servers. From time to time on random application server I get this exception: 2014-11-04 10:37:15,301 - ERROR: Servlet.s