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https://issues.apache.org/jira/browse/HDFS-15243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17068361#comment-17068361
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Ayush Saxena commented on HDFS-15243:
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Thanx [~rain_lyy] for putting this up.
Protected directories is to prevent accidental delete of the whole directory,
not to prevent data deletions inside the directory. Please check the
description in core-default.xml :
{noformat}
A comma-separated list of directories which cannot
be deleted or renamed even by the superuser unless they are empty. This
setting can be used to guard important system directories
against accidental deletion due to administrator error.
{noformat}
> Child directory should not be deleted or renamed if parent directory is a
> protected directory
> ---------------------------------------------------------------------------------------------
>
> Key: HDFS-15243
> URL: https://issues.apache.org/jira/browse/HDFS-15243
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: 3.1.1
> Affects Versions: 3.1.1
> Reporter: liuyanyu
> Priority: Major
>
> HDFS-8983 add fs.protected.directories to support protected directories on
> NameNode. But as I test, when set a parent directory（eg /testA) to
> protected directory, the child directory (eg /testA/testB) still can be
> deleted or renamed. When we protect a directory mainly for protecting the
> data under this directory , So I think the child directory should not be
> delete or renamed if the parent directory is a protected directory.
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