/*
* convert from a result set record to an object
*/
private static DfsDataNode createDfsDataNode(ResultSet rs) {
DfsDataNode obj = null;
try {
obj = new DfsDataNode(
rs.getTimestamp("timestamp"),
rs.getString("host"),
rs.getDouble("block_reports_avg_time"),
rs.getDouble("block_reports_num_ops"),
rs.getDouble("block_verification_failures"),