[HDFS-11968] ViewFS: StoragePolicies commands fail with HDFS federation

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.1
• Fix Version/s: 3.1.0, 3.0.3
• Component/s: hdfs
• Hadoop Flags: Reviewed
• Assignee: Mukul Kumar Singh
• Reporter: Mukul Kumar Singh
• Created: 12/Jun/17 10:34
• Updated: 06/Apr/18 22:18
• Resolved: 03/Oct/17 18:25

Description

hdfs storagepolicies command fails with HDFS federation.

For storage policies commands, a given user path should be resolved to a HDFS path and
storage policy command should be applied onto the resolved HDFS path.

  static DistributedFileSystem getDFS(Configuration conf)
      throws IOException {
    FileSystem fs = FileSystem.get(conf);
    if (!(fs instanceof DistributedFileSystem)) {
      throw new IllegalArgumentException("FileSystem " + fs.getUri() +
          " is not an HDFS file system");
    }
    return (DistributedFileSystem)fs;
  }