Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org> (cherry picked from commit 3ead525c71cba068e7abf1c76ad629bfeec10852) Conflicts: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/JsonUtil.java hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/WebHDFS.md