Execute creation of keyspace and tables is limited to one thread at a time to reduce the risk of (annoying) "Column family ID mismatch" exception when write and read-side plugins are started at the same time.
Execute creation of keyspace and tables is limited to one thread at a time to reduce the risk of (annoying) "Column family ID mismatch" exception when write and read-side plugins are started at the same time. Those statements are retried, because that could happen across different nodes also but serializing those statements gives a better "experience".