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Date: Wed, 24 Nov 2010 16:40:16 -0500 (EST)
From: "Devaraj Das (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-6978) Add JNI support for secure IO
 operations
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     [ https://issues.apache.org/jira/browse/HADOOP-6978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Devaraj Das updated HADOOP-6978:
--------------------------------

    Attachment: fstat.patch

We could move the discussion/fix on the caching to a separate jira.
In testing the patch, it was found that NativeIO fails when the map outputs are large. Owen fixed this issue (patch attached). We should include the fix in this patch.

+1 on the patch otherwise.

> Add JNI support for secure IO operations
> ----------------------------------------
>
>                 Key: HADOOP-6978
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6978
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io, native, security
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>             Fix For: 0.22.0
>
>         Attachments: fstat.patch, hadoop-6978.txt, hadoop-6978.txt
>
>
> In support of MAPREDUCE-2096, we need to add some JNI functionality. In particular, we need the ability to use fstat() on an open file stream, and to use open() with O_EXCL, O_NOFOLLOW, and without O_CREAT.

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