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From: Harsh J <harsh@cloudera.com>
Date: Tue, 09 Feb 2016 03:26:36 +0000
Message-ID: 
 <CAOcnVr3LHEjD2T6unBTQb1f_FATbtyt_JoB6YO_i8BWKX=5L-A@mail.gmail.com>
Subject: Re: hdfs : Change supergroup
To: Francis Dupin <francis.dupin@ifsttar.fr>,
	"user@hadoop.apache.org" <user@hadoop.apache.org>
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Changing the supergroup configuration would not affect the existing group
maintained on the file inodes (its persisted since the beginning, not
pulled dynamically from config at every restart). You will need to manually
fs -chgrp those.

On Mon, Feb 8, 2016 at 10:15 PM Francis Dupin <francis.dupin@ifsttar.fr>
wrote:

> Dear all,
>
> Concern Hadoop 2.6.0
>
> When I create a file as superuser, the group owner is 99.
>
>
> But I have created a user:group for the superuser : hadoop:hadoop (1003)
> and added in hdfs-site.xml :
>
>
> <property>
> <name>dfs.permissions.supergroup</name>
> <value>hadoop</value>
> <description>
> The name of the group of super-users
> </description>
> </property>
>
> Restarted all ... No change :
> Files created are owned by hadoop:99 and in the webUI I can read
> "hadoop:supergroup"
>
>
> Any idea ?
>
> Thank you
>
>
>
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<div dir=3D"ltr">Changing the supergroup configuration would not affect the=
 existing group maintained on the file inodes (its persisted since the begi=
nning, not pulled dynamically from config at every restart). You will need =
to manually fs -chgrp those.</div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr">On Mon, Feb 8, 2016 at 10:15 PM Francis Dupin &lt;<a href=3D"mailt=
o:francis.dupin@ifsttar.fr">francis.dupin@ifsttar.fr</a>&gt; wrote:<br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:=
1px #ccc solid;padding-left:1ex">Dear all,<br>
<br>
Concern Hadoop 2.6.0<br>
<br>
When I create a file as superuser, the group owner is 99.<br>
<br>
<br>
But I have created a user:group for the superuser : hadoop:hadoop (1003)<br=
>
and added in hdfs-site.xml :<br>
<br>
<br>
&lt;property&gt;<br>
&lt;name&gt;dfs.permissions.supergroup&lt;/name&gt;<br>
&lt;value&gt;hadoop&lt;/value&gt;<br>
&lt;description&gt;<br>
The name of the group of super-users<br>
&lt;/description&gt;<br>
&lt;/property&gt;<br>
<br>
Restarted all ... No change :<br>
Files created are owned by hadoop:99 and in the webUI I can read<br>
&quot;hadoop:supergroup&quot;<br>
<br>
<br>
Any idea ?<br>
<br>
Thank you<br>
<br>
<br>
<br>
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