In earlier post same thread you mentioned that replication factor should be set to less than N.
Currently I am testing on 2 node cluster and I was able to set replication_factor to 2 (=N) and also when I did cfstats (I don't quite understand cfstats in detail) and see some activity on both nodes now. [default@twissandra] update keyspace twissandra with replication_factor=2; 3ed6b708-389b-11e0-993f-b7fa7ed61af9 [default@twissandra] set users['b']['add']='111'; Value inserted. On the other node when I ran nodetool with -h as localhost, I see: Column Family: users SSTable count: 0 Space used (live): 0 Space used (total): 0 Memtable Columns Count: 2 Memtable Data Size: 52 Memtable Switch Count: 0 Read Count: 3 Read Latency: NaN ms. Write Count: 2 Write Latency: NaN ms. Pending Tasks: 0 Key cache capacity: 200000 Key cache size: 0 Key cache hit rate: NaN Row cache: disabled Compacted row minimum size: 0 Compacted row maximum size: 0 Compacted row mean size: 0 -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Internal-error-processing-insert-tp6025740p6025878.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.