Try to set broadcast_rpc_address on each node to its real external IP address.
Best regards, Vladimir Yudovin, Winguzone - Hosted Cloud Cassandra Launch your cluster in minutes. ---- On Mon, 21 Nov 2016 05:47:00 -0500techpyaasa . <techpya...@gmail.com> wrote ---- Following exception intermittently thrown by datastax java driver though all nodes are up.(Happening for both read & write queries) "Exception com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (no host was tried) at com.datastax.driver.core.exceptions.NoHostAvailableException.copy(NoHostAvailableException.java:84) at com.datastax.driver.core.DriverThrowables.propagateCause(DriverThrowables.java:37) at com.datastax.driver.core.DefaultResultSetFuture.getUninterruptibly(DefaultResultSetFuture.java:214) at com.datastax.driver.core.AbstractSession.execute(AbstractSession.java:52) at" Using c*-2.0.17 , datastax java driver - cassandra-driver-core-2.1.8.jar. In cassandra.yaml following were set rpc_address: 0.0.0.0 , broadcast_rpc_address: 1.2.3.4 Have anyone faced such issue ? What could be the reason and fix for it? Thanks in advance Techpyaasa.