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https://issues.apache.org/jira/browse/HDFS-7389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Nauroth updated HDFS-7389:
--------------------------------
Resolution: Fixed
Fix Version/s: 2.7.0
Status: Resolved (was: Patch Available)
I have committed this to trunk and branch-2. Chunjun, thank you for reporting
the bug. Vinay, thank you for providing the patch.
> Named user ACL cannot stop the user from accessing the FS entity.
> -----------------------------------------------------------------
>
> Key: HDFS-7389
> URL: https://issues.apache.org/jira/browse/HDFS-7389
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.5.1
> Reporter: Chunjun Xiao
> Assignee: Vinayakumar B
> Fix For: 2.7.0
>
> Attachments: HDFS-7389-001.patch, HDFS-7389-002.patch
>
>
> In
> http://hortonworks.com/blog/hdfs-acls-fine-grained-permissions-hdfs-files-hadoop/:
> {quote}
> It’s important to keep in mind the order of evaluation for ACL entries when a
> user attempts to access a file system object:
> 1. If the user is the file owner, then the owner permission bits are enforced.
> 2. Else if the user has a named user ACL entry, then those permissions are
> enforced.
> 3. Else if the user is a member of the file’s group or any named group in an
> ACL entry, then the union of permissions for all matching entries are
> enforced. (The user may be a member of multiple groups.)
> 4. If none of the above were applicable, then the other permission bits are
> enforced.
> {quote}
> Assume we have a user UserA from group GroupA, if we config a directory as
> following ACL entries:
> group:GroupA:rwx
> user:UserA:---
> According to the design spec above, userA should have no access permission to
> the file object, while actually userA still has rwx access to the dir.
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