/// <summary>
/// Derive the namenode http address from the current file system,
/// either default or as set by "-fs" in the generic options.
/// </summary>
/// <returns>Returns http address or null if failure.</returns>
/// <exception cref="System.IO.IOException">if we can't determine the active NN address
/// </exception>
private URI GetCurrentNamenodeAddress(Path target)
{
//String nnAddress = null;
Configuration conf = GetConf();
//get the filesystem object to verify it is an HDFS system
FileSystem fs = target.GetFileSystem(conf);
if (!(fs is DistributedFileSystem))
{
System.Console.Error.WriteLine("FileSystem is " + fs.GetUri());
return(null);
}
return(DFSUtil.GetInfoServer(HAUtil.GetAddressOfActive(fs), conf, DFSUtil.GetHttpClientScheme
(conf)));
}