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https://issues.apache.org/jira/browse/HDFS-6165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yongjun Zhang updated HDFS-6165:
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Attachment: HDFS-6165.005.patch
> "hdfs dfs -rm -r" and "hdfs -rmdir" commands can't remove empty directory
> --------------------------------------------------------------------------
>
> Key: HDFS-6165
> URL: https://issues.apache.org/jira/browse/HDFS-6165
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.3.0
> Reporter: Yongjun Zhang
> Assignee: Yongjun Zhang
> Priority: Minor
> Attachments: HDFS-6165.001.patch, HDFS-6165.002.patch,
> HDFS-6165.003.patch, HDFS-6165.004.patch, HDFS-6165.004.patch,
> HDFS-6165.005.patch
>
>
> Given a directory owned by user A with WRITE permission containing an empty
> directory owned by user B, it is not possible to delete user B's empty
> directory with either "hdfs dfs -rm -r" or "hdfs dfs -rmdir". Because the
> current implementation requires FULL permission of the empty directory, and
> throws exception.
> On the other hand, on linux, "rm -r" and "rmdir" command can remove empty
> directory as long as the parent directory has WRITE permission (and prefix
> component of the path have EXECUTE permission), For the tested OSes, some
> prompt user asking for confirmation, some don't.
> Here's a reproduction:
> {code}
> [root@vm01 ~]# hdfs dfs -ls /user/
> Found 4 items
> drwxr-xr-x - userabc users 0 2013-05-03 01:55 /user/userabc
> drwxr-xr-x - hdfs supergroup 0 2013-05-03 00:28 /user/hdfs
> drwxrwxrwx - mapred hadoop 0 2013-05-03 00:13 /user/history
> drwxr-xr-x - hdfs supergroup 0 2013-04-14 16:46 /user/hive
> [root@vm01 ~]# hdfs dfs -ls /user/userabc
> Found 8 items
> drwx------ - userabc users 0 2013-05-02 17:00 /user/userabc/.Trash
> drwxr-xr-x - userabc users 0 2013-05-03 01:34 /user/userabc/.cm
> drwx------ - userabc users 0 2013-05-03 01:06
> /user/userabc/.staging
> drwxr-xr-x - userabc users 0 2013-04-14 18:31 /user/userabc/apps
> drwxr-xr-x - userabc users 0 2013-04-30 18:05 /user/userabc/ds
> drwxr-xr-x - hdfs users 0 2013-05-03 01:54 /user/userabc/foo
> drwxr-xr-x - userabc users 0 2013-04-30 16:18
> /user/userabc/maven_source
> drwxr-xr-x - hdfs users 0 2013-05-03 01:40
> /user/userabc/test-restore
> [root@vm01 ~]# hdfs dfs -ls /user/userabc/foo/
> [root@vm01 ~]# sudo -u userabc hdfs dfs -rm -r -skipTrash /user/userabc/foo
> rm: Permission denied: user=userabc, access=ALL,
> inode="/user/userabc/foo":hdfs:users:drwxr-xr-x
> {code}
> The super user can delete the directory.
> {code}
> [root@vm01 ~]# sudo -u hdfs hdfs dfs -rm -r -skipTrash /user/userabc/foo
> Deleted /user/userabc/foo
> {code}
> The same is not true for files, however. They have the correct behavior.
> {code}
> [root@vm01 ~]# sudo -u hdfs hdfs dfs -touchz /user/userabc/foo-file
> [root@vm01 ~]# hdfs dfs -ls /user/userabc/
> Found 8 items
> drwx------ - userabc users 0 2013-05-02 17:00 /user/userabc/.Trash
> drwxr-xr-x - userabc users 0 2013-05-03 01:34 /user/userabc/.cm
> drwx------ - userabc users 0 2013-05-03 01:06
> /user/userabc/.staging
> drwxr-xr-x - userabc users 0 2013-04-14 18:31 /user/userabc/apps
> drwxr-xr-x - userabc users 0 2013-04-30 18:05 /user/userabc/ds
> -rw-r--r-- 1 hdfs users 0 2013-05-03 02:11
> /user/userabc/foo-file
> drwxr-xr-x - userabc users 0 2013-04-30 16:18
> /user/userabc/maven_source
> drwxr-xr-x - hdfs users 0 2013-05-03 01:40
> /user/userabc/test-restore
> [root@vm01 ~]# sudo -u userabc hdfs dfs -rm -skipTrash /user/userabc/foo-file
> Deleted /user/userabc/foo-file
> {code}
> Using "hdfs dfs -rmdir" command:
> {code}
> bash-4.1$ hadoop fs -lsr /
> lsr: DEPRECATED: Please use 'ls -R' instead.
> drwxr-xr-x - hdfs supergroup 0 2014-03-25 16:29 /user
> drwxr-xr-x - hdfs supergroup 0 2014-03-25 16:28 /user/hdfs
> drwxr-xr-x - usrabc users 0 2014-03-28 23:39 /user/usrabc
> drwxr-xr-x - abc abc 0 2014-03-28 23:39
> /user/usrabc/foo-empty1
> [root@vm01 usrabc]# su usrabc
> [usrabc@vm01 ~]$ hdfs dfs -rmdir /user/usrabc/foo-empty1
> rmdir: Permission denied: user=usrabc, access=ALL,
> inode="/user/usrabc/foo-empty1":abc:abc:drwxr-xr-x
> {code}
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