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https://issues.apache.org/jira/browse/HDFS-4666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632097#comment-13632097
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Aaron T. Myers commented on HDFS-4666:
--------------------------------------
Sounds fine to me to do it in a separate JIRA if we later decide it's
necessary. I think automatic rename with a WARN printed in the log when
upgrading is the best option, but this implementation + a release note is fine
for now.
> Disallow users to create file/dir named ".snapshot"
> ---------------------------------------------------
>
> Key: HDFS-4666
> URL: https://issues.apache.org/jira/browse/HDFS-4666
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Jing Zhao
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: editsStored, h4666_20130413b.patch,
> h4666_20130413.patch, h4666_20130415.patch
>
>
> Currently ".snapshot" is reserved by snapshots as a special tag to specify
> the path leading to snapshot copies. We should disallow users to create
> file/dir using name ".snapshot".
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