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Brian Bockelman commented on HADOOP-5551:
-----------------------------------------
Test failures appear to be unrelated?
> Namenode permits directory destruction on overwrite
> ---------------------------------------------------
>
> Key: HADOOP-5551
> URL: https://issues.apache.org/jira/browse/HADOOP-5551
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.19.1
> Reporter: Brian Bockelman
> Assignee: Brian Bockelman
> Priority: Critical
> Fix For: 0.19.2, 0.20.0
>
> Attachments: HADOOP-5551-v2.patch, HADOOP-5551-v3.patch, HADOOP-5551-v4.patch
>
>
> The FSNamesystem's startFileInternal allows overwriting of directories. That is, if
you have a directory named /foo/bar and you try to write a file named /foo/bar, the file is
written and the directory disappears.
> This is most apparent for folks using libhdfs directly, as overwriting is always turned
on. Therefore, if libhdfs applications do not check the existence of a directory first, then
they will permit new files to destroy directories.
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