Cassandra 2.1.9 has been released (changelog here).
Cassandra 2.1.10 has been released (changelog here).
Cassandra 2.1.11 has been released (changelog here).
Cassandra 2.1.9 has been released (changelog here).
Cassandra 2.1.10 has been released (changelog here).
Cassandra 2.1.11 has been released (changelog here).