[jira] [Created] (HDFS-8542) WebHDFS getHomeDirectory behavior does not match specification

["Jakob Homan (JIRA)" <ji...@apache.org>]

Jakob Homan created HDFS-8542:
---------------------------------

             Summary: WebHDFS getHomeDirectory behavior does not match specification
                 Key: HDFS-8542
                 URL: https://issues.apache.org/jira/browse/HDFS-8542
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: webhdfs
    Affects Versions: 2.6.0
            Reporter: Jakob Homan


Per the [spec|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Get_Home_Directory], WebHDFS provides a REST endpoint for getting the user's home directory:
{noformat}Submit a HTTP GET request.

curl -i "http://<HOST>:<PORT>/webhdfs/v1/?op=GETHOMEDIRECTORY"{noformat}

However, WebHDFSFileSystem.java does not use this, instead building the home [directory locally|https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java#L271]:
{code}  /** @return the home directory. */
  public static String getHomeDirectoryString(final UserGroupInformation ugi) {
    return "/user/" + ugi.getShortUserName();
  }

  @Override
  public Path getHomeDirectory() {
    return makeQualified(new Path(getHomeDirectoryString(ugi)));
  }{code}

The WebHDFSFileSystem client should call to the REST service to determine the home directory.




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