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https://issues.apache.org/jira/browse/HDFS-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15932174#comment-15932174
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John Zhuge commented on HDFS-240:
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Check out this article [Fixing Unix/Linux/POSIX Filenames:Control Characters
(such as Newline), Leading Dashes, and Other
Problems|https://www.dwheeler.com/essays/fixing-unix-linux-filenames.html].
> Should HDFS restrict the names used for files?
> ----------------------------------------------
>
> Key: HDFS-240
> URL: https://issues.apache.org/jira/browse/HDFS-240
> Project: Hadoop HDFS
> Issue Type: New Feature
> Affects Versions: 2.7.2
> Reporter: Robert Chansler
> Assignee: John Zhuge
>
> When reviewing the consequences of HADOOP-6017 (the name system could not
> start because a file name interpreted as a regex caused a fault), the
> discussion turned to improving the test set for file system functions by
> broadening the set of names used for testing. Presently, HDFS allows any name
> without a slash. _Should the space of names be restricted?_ If most funny
> names are unintended, maybe the user would benefit from an early error
> indication. A contrary view is that restricting names is so 20th-century.
> Should be or shouldn't we?
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