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https://issues.apache.org/jira/browse/HDFS-5613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13857133#comment-13857133
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Chris Nauroth commented on HDFS-5613:
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I expect that no actual code changes are required to support ACLs in
combination with symlinks. {{FSPermissionChecker}} already knows how to follow
the symlink when necessary before doing the permission check, and the patch in
HDFS-5612 will enforce permissions for ACLs, so I expect the two will work
together. I'm still going to leave this issue open so that we can add tests to
{{TestPermissionSymlinks}} to cover it.
> NameNode: implement handling of ACLs in combination with symlinks.
> ------------------------------------------------------------------
>
> Key: HDFS-5613
> URL: https://issues.apache.org/jira/browse/HDFS-5613
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: namenode
> Affects Versions: HDFS ACLs (HDFS-4685)
> Reporter: Chris Nauroth
>
> A symlink in HDFS does not have an ACL of its own. Operations that modify
> the ACL of a symlink instead modify the target of the symlink. For
> operations that enforce ACLs, enforcement is on the target of the symlink.
> This is similar to existing handling of permissions for symlinks.
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