Stephen Chu created HDFS-6488:
---------------------------------
Summary: HDFS superuser unable to access user's Trash files using
NFSv3 mount
Key: HDFS-6488
URL: https://issues.apache.org/jira/browse/HDFS-6488
Project: Hadoop HDFS
Issue Type: Bug
Components: nfs
Affects Versions: 2.3.0
Reporter: Stephen Chu
As hdfs superuseruser on the NFS mount, I cannot cd or ls the /user/schu/.Trash
directory:
{code}
bash-4.1$ cd .Trash/
bash: cd: .Trash/: Permission denied
bash-4.1$ ls -la
total 2
drwxr-xr-x 4 schu 2584148964 128 Jan 7 10:42 .
drwxr-xr-x 4 hdfs 2584148964 128 Jan 6 16:59 ..
drwx------ 2 schu 2584148964 64 Jan 7 10:45 .Trash
drwxr-xr-x 2 hdfs hdfs 64 Jan 7 10:42 tt
bash-4.1$ ls .Trash
ls: cannot open directory .Trash: Permission denied
bash-4.1$
{code}
When using FsShell as hdfs superuser, I have superuser permissions to schu's
.Trash contents:
{code}
bash-4.1$ hdfs dfs -ls -R /user/schu/.Trash
drwx------ - schu supergroup 0 2014-01-07 10:48
/user/schu/.Trash/Current
drwx------ - schu supergroup 0 2014-01-07 10:48
/user/schu/.Trash/Current/user
drwx------ - schu supergroup 0 2014-01-07 10:48
/user/schu/.Trash/Current/user/schu
-rw-r--r-- 1 schu supergroup 4 2014-01-07 10:48
/user/schu/.Trash/Current/user/schu/tf1
{code}
The NFSv3 logs don't produce any error when superuser tries to access schu
Trash contents. However, for other permission errors (e.g. schu tries to delete
a directory owned by hdfs), there will be a permission error in the logs.
I think this is not specific to the .Trash directory perhaps.
I created a /user/schu/dir1 which has the same permissions as .Trash (700).
When I try cd'ing into the directory from the NFSv3 mount as hdfs superuser, I
get the same permission denied.
{code}
[schu@hdfs-nfs ~]$ hdfs dfs -ls
Found 4 items
drwx------ - schu supergroup 0 2014-01-07 10:57 .Trash
drwx------ - schu supergroup 0 2014-01-07 11:05 dir1
-rw-r--r-- 1 schu supergroup 4 2014-01-07 11:05 tf1
drwxr-xr-x - hdfs hdfs 0 2014-01-07 10:42 tt
bash-4.1$ whoami
hdfs
bash-4.1$ pwd
/hdfs_nfs_mount/user/schu
bash-4.1$ cd dir1
bash: cd: dir1: Permission denied
bash-4.1$
{code}
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