Hey, When adding a new data center to our production C* datacenter using the procedure described in [1], some of our application requests were returning null/empty values. Rebuild was not complete in the new datacenter, so my guess is that some requests were being directed to the brand new datacenter which still didn't have the data.
Our Hector client was connected only to the original nodes, with autoDiscoverHosts=false and we use ConsistencyLevel.ONE for reads. The keyspace schema was already configured to use both data centers. My question is: is it possible that the dynamic snitch is choosing the nodes in the new (empty) datacenter when CL=ONE? In this case, it's mandatory to use CL=LOCAL_ONE during bootstrap/rebuild of a new datacenter, otherwise empty data might be returned, correct? Cheers, [1] http://www.datastax.com/documentation/cassandra/1.2/webhelp/cassandra/operations/ops_add_dc_to_cluster_t.html -- *Paulo Motta* Chaordic | *Platform* *www.chaordic.com.br <http://www.chaordic.com.br/>* +55 48 3232.3200 +55 83 9690-1314
