[jira] [Created] (HDFS-12485) expunge may not remove trash from non-home directory encryption zone

["Wei-Chiu Chuang (JIRA)" <ji...@apache.org>]

Wei-Chiu Chuang created HDFS-12485:
--------------------------------------

             Summary: expunge may not remove trash from non-home directory encryption zone
                 Key: HDFS-12485
                 URL: https://issues.apache.org/jira/browse/HDFS-12485
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 3.0.0-alpha1, 2.8.0
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang


If I log into Linux as root, and then login as the superuser hdfs@EXAMPLE.COM
{noformat}
[root@nightly511-1 ~]# hdfs dfs -rm /scale/b
17/09/18 15:21:32 INFO fs.TrashPolicyDefault: Moved: 'hdfs://ns1/scale/b' to trash at: hdfs://ns1/scale/.Trash/hdfs/Current/scale/b
[root@nightly511-1 ~]# hdfs dfs -expunge
17/09/18 15:21:59 INFO fs.TrashPolicyDefault: TrashPolicyDefault#deleteCheckpoint for trashRoot: hdfs://ns1/user/hdfs/.Trash
17/09/18 15:21:59 INFO fs.TrashPolicyDefault: TrashPolicyDefault#deleteCheckpoint for trashRoot: hdfs://ns1/user/hdfs/.Trash
17/09/18 15:21:59 INFO fs.TrashPolicyDefault: Deleted trash checkpoint: /user/hdfs/.Trash/170918143916
17/09/18 15:21:59 INFO fs.TrashPolicyDefault: TrashPolicyDefault#createCheckpoint for trashRoot: hdfs://ns1/user/hdfs/.Trash
[root@nightly511-1 ~]# hdfs dfs -ls hdfs://ns1/scale/.Trash/hdfs/Current/scale/b
-rw-r--r--   3 hdfs systest          0 2017-09-18 15:21 hdfs://ns1/scale/.Trash/hdfs/Current/scale/b
{noformat}

expunge does not remove trash under /scale, because it does not know I am 'hdfs' user.

{code:title=DistributedFileSystem#getTrashRoots}
Path ezTrashRoot = new Path(it.next().getPath(),
            FileSystem.TRASH_PREFIX);
        if (!exists(ezTrashRoot)) {
          continue;
        }
        if (allUsers) {
          for (FileStatus candidate : listStatus(ezTrashRoot)) {
            if (exists(candidate.getPath())) {
              ret.add(candidate);
            }
          }
        } else {
          Path userTrash = new Path(ezTrashRoot, System.getProperty(
              "user.name")); --> bug
          try {
            ret.add(getFileStatus(userTrash));
          } catch (FileNotFoundException ignored) {
          }
        }
{code}

It should use UGI for user name, rather than system login user name.



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