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https://issues.apache.org/jira/browse/HDFS-10689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394212#comment-15394212
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Andrew Wang commented on HDFS-10689:
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Thanks for digging into this Manoj. I'm of the opinion that we should try to
imitate the Linux/BSD behavior, since that'll be least surprising to end users.
Now the question is if we declare this a bug fix that can be backported to
branch-2, or if this behavior change is too incompatible. Given that sticky
bits are pretty rare in general, I think it's safe for branch-2, but would
welcome other's thoughts. Anything to add [~cnauroth]?
> "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
> Reporter: Manoj Govindassamy
> Assignee: Manoj Govindassamy
> Priority: Minor
>
> 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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