Astyanax driver is always connecting to one node in whole cluster

Question

We have Cassandra set up with 3 datacenter and 17 nodes in each data center. We are seeing strange issue as on one node in DC1 is acting always as coordinator node and if for some reason this node goes down whole cluster is not reachable. We are seeing this very frequently and we have not mentioned this IP in our code base.

Cassandra : 2.0
Astyananx : 3.8
cassandra.astyanax.connectionPoolType=TOKEN_AWARE
cassandra.astyanax.defaultReadConsistencyLevel=CL_LOCAL_QUORUM
cassandra.astyanax.defaultWriteConsistencyLevel=CL_LOCAL_QUORUM
cassandra.astyanax.retryCount=3
cassandra.astyanax.discoveryDelayInSeconds=60
cassandra.astyanax.discoveryType=RING_DESCRIBE
cassandra.astyanax.cqlVersion=3.0.0
cassandra.astyanax.targetCassandraVersion=2.0

Please help us here.

Thanks Virendra Agarwal

Answer 1

As your replication factor one and using connectionPoolType TOKEN_AWARE, it should attempt to contact only the nodes that actually store the data and in your case it is 1 node only in local dc. Check this for more details.