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Date: Fri, 3 Jun 2011 08:33:47 +0000 (UTC)
From: "Matt Foley (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-7327) FileSystem.listStatus() throws
 NullPointerException instead of IOException upon access permission failure
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    [ https://issues.apache.org/jira/browse/HADOOP-7327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043250#comment-13043250 ] 

Matt Foley commented on HADOOP-7327:
------------------------------------

Although this issue was discovered while investigating HDFS-1852, it does not actually block it, so removing the "blocker" link.  It doesn't cause TestTrash to fail, it just junks up the log with NPEs while running TestTrash on a local system.

> FileSystem.listStatus() throws NullPointerException instead of IOException upon access permission failure
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-7327
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7327
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.22.0, 0.23.0
>            Reporter: Matt Foley
>            Assignee: Matt Foley
>         Attachments: hadoop-7327-1.patch
>
>
> Many processes that call listStatus() expect to handle IOException, but instead are getting runtime error NullPointerException, if the directory being scanned is visible but no-access to the running user id.  For example, if directory foo is drwxr-xr-x, and subdirectory foo/bar is drwx------, then trying to do listStatus(Path(foo/bar)) will cause a NullPointerException.

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