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https://issues.apache.org/jira/browse/HADOOP-771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497005
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Doug Cutting commented on HADOOP-771:
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> A single RPC to delete an entire directory structure is the main problem
On the other hand, won't an RPC per file cause a lot of namenode traffic?
> Namenode should return error when trying to delete non-empty directory
> ----------------------------------------------------------------------
>
> Key: HADOOP-771
> URL: https://issues.apache.org/jira/browse/HADOOP-771
> Project: Hadoop
> Issue Type: Improvement
> Components: dfs
> Affects Versions: 0.8.0
> Environment: all
> Reporter: Milind Bhandarkar
> Assigned To: Sameer Paranjpye
>
> Currently, the namenode.delete() method allows recursive deletion of a
> directory. That is, even a non-empty directory could be deleted using
> namenode.delete(). To avoid costly programmer errors, the namenode should not
> remove the non-empty directories in this method. Recursively deleting
> directory should either be performed with listPaths() followed by a delete()
> for every path, or with a specific namenode method such as deleteRecursive().
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