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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10689) "hdfs dfs -chmod 777" does not remove sticky bit
Date Wed, 27 Jul 2016 22:35:20 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HDFS-10689:
-------------------------------
    Affects Version/s: 2.6.4
     Target Version/s: 3.0.0-alpha1
         Hadoop Flags: Incompatible change
          Description: 
When a directory permission is modified using hdfs dfs chmod command and when octal/numeric
format is used, the leading sticky bit is not fully honored.

1. Create a dir dir_test_with_sticky_bit
2. Apply sticky bit permission on the dir : hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
3. Remove sticky bit permission on the dir: hdfs dfs -chmod 755 /dir_test_with_sticky_bit

Expected: Remove the sticky bit on the dir, as it happens on Mac/Linux native filesystem with
native chmod.

4. However, removing sticky bit permission by explicitly turning off the bit works. hdfs dfs
-chmod 0755 /dir_test_with_sticky_bit

{noformat}
manoj@~/work/hadev-pp: hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user

manoj@~/work/hadev-pp: hdfs dfs -chmod 755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit  <===
sticky bit still intact
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user

manoj@~/work/hadev-pp: hdfs dfs -chmod 0755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user
manoj@~/work/hadev-pp: 
{noformat}




  was:

When a directory permission is modified using hdfs dfs chmod command and when octal/numeric
format is used, the leading sticky bit is not fully honored.

1. Create a dir dir_test_with_sticky_bit
2. Apply sticky bit permission on the dir : hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
3. Remove sticky bit permission on the dir: hdfs dfs -chmod 755 /dir_test_with_sticky_bit

Expected: Remove the sticky bit on the dir, as it happens on Mac/Linux native filesystem with
native chmod.

4. However, removing sticky bit permission by explicitly turning off the bit works. hdfs dfs
-chmod 0755 /dir_test_with_sticky_bit

{noformat}
manoj@~/work/hadev-pp: hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user

manoj@~/work/hadev-pp: hdfs dfs -chmod 755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit  <===
sticky bit still intact
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user

manoj@~/work/hadev-pp: hdfs dfs -chmod 0755 /dir_test_with_sticky_bit
manoj@~/work/hadev-pp: hdfs dfs -ls /
Found 2 items
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user
manoj@~/work/hadev-pp: 
{noformat}





Got it, thanks Chris. Updating the JIRA fields as appropriate.

Manoj, do you mind adding a little release note about how this change will affect end users?
Could also consider changing the summary to say what this patch will do, rather than just
what is broken.

> "hdfs dfs -chmod 777" does not remove sticky bit
> ------------------------------------------------
>
>                 Key: HDFS-10689
>                 URL: https://issues.apache.org/jira/browse/HDFS-10689
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.6.4
>            Reporter: Manoj Govindassamy
>            Assignee: Manoj Govindassamy
>            Priority: Minor
>         Attachments: HDFS-10689.001.patch
>
>
> When a directory permission is modified using hdfs dfs chmod command and when octal/numeric
format is used, the leading sticky bit is not fully honored.
> 1. Create a dir dir_test_with_sticky_bit
> 2. Apply sticky bit permission on the dir : hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
> 3. Remove sticky bit permission on the dir: hdfs dfs -chmod 755 /dir_test_with_sticky_bit
> Expected: Remove the sticky bit on the dir, as it happens on Mac/Linux native filesystem
with native chmod.
> 4. However, removing sticky bit permission by explicitly turning off the bit works. hdfs
dfs -chmod 0755 /dir_test_with_sticky_bit
> {noformat}
> manoj@~/work/hadev-pp: hdfs dfs -chmod 1755 /dir_test_with_sticky_bit
> manoj@~/work/hadev-pp: hdfs dfs -ls /
> Found 2 items
> drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
> drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user
> manoj@~/work/hadev-pp: hdfs dfs -chmod 755 /dir_test_with_sticky_bit
> manoj@~/work/hadev-pp: hdfs dfs -ls /
> Found 2 items
> drwxr-xr-t   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
 <=== sticky bit still intact
> drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user
> manoj@~/work/hadev-pp: hdfs dfs -chmod 0755 /dir_test_with_sticky_bit
> manoj@~/work/hadev-pp: hdfs dfs -ls /
> Found 2 items
> drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /dir_test_with_sticky_bit
> drwxr-xr-x   - manoj supergroup          0 2016-07-25 11:42 /user
> manoj@~/work/hadev-pp: 
> {noformat}



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