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https://issues.apache.org/jira/browse/HDFS-8115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14487931#comment-14487931
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Haohui Mai commented on HDFS-8115:
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The id of user / group only makes sense for a particular run of NN only.
This is an implementation detail and it should not be exposed to the public.
> Make PermissionStatusFormat public
> ----------------------------------
>
> Key: HDFS-8115
> URL: https://issues.apache.org/jira/browse/HDFS-8115
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Arun Suresh
> Assignee: Arun Suresh
> Priority: Minor
> Attachments: HDFS-8115.1.patch
>
>
> implementations of {{INodeAttributeProvider}} are required to provide an
> implementation of {{getPermissionLong()}} method. Unfortunately, the long
> permission format is an encoding of the user, group and mode with each field
> converted to int using {{SerialNumberManager}} which is package protected.
> Thus it would be nice to make the {{PermissionStatusFormat}} enum public (and
> also make the {{toLong()}} static method public) so that user specified
> implementations of {{INodeAttributeProvider}} may use it.
> This would also make it more consistent with {{AclStatusFormat}} which I
> guess has been made public for the same reason.
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