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https://issues.apache.org/jira/browse/HADOOP-12543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987279#comment-14987279
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Daniel Templeton commented on HADOOP-12543:
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What happens in the case when you're in /tmp and create a Path from ".."?
> Path#isRoot() returns true if the path is ".".
> ----------------------------------------------
>
> Key: HADOOP-12543
> URL: https://issues.apache.org/jira/browse/HADOOP-12543
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Reporter: Kazuho Fujii
> Attachments: HADOOP-12543.001.patch
>
>
> {{Path#isRoot()}} method is expected to return true if and only if the path
> represents the root of a file system. But, it returns true in the case where
> the path is ".". This is because {{getParent()}} method returns null when the
> path in URI is empty.
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