@Override public void init(String keyspace) { Iterator<InetAddress> hostiter = hosts.iterator(); while (hostiter.hasNext()) { try { // Query endpoint to ranges map and schemas from thrift InetAddress host = hostiter.next(); Cassandra.Client client = createThriftClient( host.getHostAddress(), rpcPort, this.user, this.passwd, this.transportFactory); setPartitioner(client.describe_partitioner()); Token.TokenFactory tkFactory = getPartitioner().getTokenFactory(); for (TokenRange tr : client.describe_ring(keyspace)) { Range<Token> range = new Range<>( tkFactory.fromString(tr.start_token), tkFactory.fromString(tr.end_token), getPartitioner()); for (String ep : tr.endpoints) { addRangeForEndpoint(range, InetAddress.getByName(ep)); } } String query = String.format( "SELECT * FROM %s.%s WHERE keyspace_name = '%s'", Keyspace.SYSTEM_KS, SystemKeyspace.SCHEMA_COLUMNFAMILIES_CF, keyspace); CqlResult result = client.execute_cql3_query( ByteBufferUtil.bytes(query), Compression.NONE, ConsistencyLevel.ONE); for (CqlRow row : result.rows) { CFMetaData metadata = CFMetaData.fromThriftCqlRow(row); knownCfs.put(metadata.cfName, metadata); } break; } catch (Exception e) { if (!hostiter.hasNext()) throw new RuntimeException("Could not retrieve endpoint ranges: ", e); } } }