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https://issues.apache.org/jira/browse/HDFS-10324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15259195#comment-15259195
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Wei-Chiu Chuang commented on HDFS-10324:
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It is true that this API is used only in unit tests in Hadoop, but downstream
project might use it. What do we typically consider when changing public API?
> Trash directory in an encryption zone should be pre-created with sticky bit
> ---------------------------------------------------------------------------
>
> Key: HDFS-10324
> URL: https://issues.apache.org/jira/browse/HDFS-10324
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption
> Affects Versions: 2.8.0
> Environment: CDH5.7.0
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Attachments: HDFS-10324.001.patch, HDFS-10324.002.patch,
> HDFS-10324.003.patch
>
>
> We encountered a bug in HDFS-8831:
> After HDFS-8831, a deleted file in an encryption zone is moved to a .Trash
> subdirectory within the encryption zone.
> However, if this .Trash subdirectory is not created beforehand, it will be
> created and owned by the first user who deleted a file, with permission
> drwx------. This creates a serious bug because any other non-privileged user
> will not be able to delete any files within the encryption zone, because they
> do not have the permission to move directories to the trash directory.
> We should fix this bug, by pre-creating the .Trash directory with sticky bit.
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