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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6664) HDFS permissions guide documentation states incorrect default group mapping class.
Date Mon, 11 Aug 2014 02:44:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14092368#comment-14092368
] 

Akira AJISAKA commented on HDFS-6664:
-------------------------------------

Thanks [~rchiang] for the patch! Some comments:
1.
{code}
+   the <code>bash -c groups</code> command to resolve a list of
{code}
{{<code>}} and {{</code>}} should be {{<<<}} and {{>>>}}. Most
of Hadoop documents are now written in APT format (*.apt.vm). The format is described in http://maven.apache.org/doxia/references/apt-format.html

2.
{code}
+   This implementation shells out to the Linux/Unix environment with
{code}
{{ShellBasedUnixGroupsMappings}} now supports Windows also.

3 (minor).
{code}
+   JNI is available the implementation will use the API within hadoop
{code}
I think it's better to add a comma(,) between 'available' and 'the'.

> HDFS permissions guide documentation states incorrect default group mapping class.
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-6664
>                 URL: https://issues.apache.org/jira/browse/HDFS-6664
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: documentation
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Chris Nauroth
>            Priority: Trivial
>              Labels: newbie
>         Attachments: HDFS6664-01.patch
>
>
> The HDFS permissions guide states that our default group mapping class is {{org.apache.hadoop.security.ShellBasedUnixGroupsMapping}}.
 This is no longer true.  The default has been changed to {{org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback}}.



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