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https://issues.apache.org/jira/browse/HADOOP-8906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13474251#comment-13474251
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Jason Lowe commented on HADOOP-8906:
------------------------------------
The corner case is now handled, but the new tests added don't test for it.
There should be a test for a non-globbed path for an existing file with the
false filter, and all the false filter tests check for either a globbed path or
non-existent files.
I tried adding a test locally with the false filter for "/" and noticed that it
didn't return null. Instead it returned "/" because the filter isn't applied
in the special cases of "/" and "", which seems wrong. It turns out that the
existing code also had this bug, so I suppose it's at least consistent with the
previous version's behavior.
> paths with multiple globs are unreliable
> ----------------------------------------
>
> Key: HADOOP-8906
> URL: https://issues.apache.org/jira/browse/HADOOP-8906
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-8906-branch_0.23.patch, HADOOP-8906.patch,
> HADOOP-8906.patch, HADOOP-8906.patch, HADOOP-8906.patch, HADOOP-8906.patch
>
>
> Let's say we have have a structure of "$date/$user/stuff/file". Multiple
> globs are unreliable unless every directory in the structure exists.
> These work:
> date*/user
> date*/user/stuff
> date*/user/stuff/file
> These fail:
> date*/user/*
> date*/user/*/*
> date*/user/stu*
> date*/user/stu*/*
> date*/user/stu*/file
> date*/user/stuff/*
> date*/user/stuff/f*
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