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https://issues.apache.org/jira/browse/HADOOP-18188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17514459#comment-17514459
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Viraj Jasani commented on HADOOP-18188:
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I mean if some application expects PathIsDirectoryException to be thrown for
touch command used with directory, from that viewpoint this behaviour change
might be treated as incompatible?
Regardless, I agree with supporting directory with touch command.
> Support touch command for directory
> -----------------------------------
>
> Key: HADOOP-18188
> URL: https://issues.apache.org/jira/browse/HADOOP-18188
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Akira Ajisaka
> Priority: Major
>
> Currently hadoop fs -touch command cannot update the mtime and the atime of
> directory. The feature would be useful when we check whether the filesystem
> is ready to write or not without creating any file.
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