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From: Francis Dupin <francis.dupin@ifsttar.fr>
Subject: Re: hdfs : Change supergroup
References: <56B8C63D.8070009@ifsttar.fr>
 <CAOcnVr3LHEjD2T6unBTQb1f_FATbtyt_JoB6YO_i8BWKX=5L-A@mail.gmail.com>
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
Message-ID: <56BD94BE.4060105@ifsttar.fr>
Date: Fri, 12 Feb 2016 09:15:58 +0100
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Thank you.

I think my problem was here :

When a file or directory is created, its owner is the user identity of=20
the client process, and its group is the group of the parent directory=20
(the BSD rule).


Le 09/02/2016 04:26, Harsh J a =C3=A9crit :
> Changing the supergroup configuration would not affect the existing=20
> group maintained on the file inodes (its persisted since the=20
> beginning, not pulled dynamically from config at every restart). You=20
> will need to manually fs -chgrp those.
>
> On Mon, Feb 8, 2016 at 10:15 PM Francis Dupin=20
> <francis.dupin@ifsttar.fr <mailto: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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--=20
-------------------------

Francis Dupin
Bureau C106
tel : 01 81 66 83 82

IFSTTAR
COSYS / GRETTIA
B=C3=A2timent : Bienven=C3=BCe
14-20 Boulevard Newton - Champs-sur-Marne -
77447 Marne-la-Vall=C3=A9e


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<html>
  <head>
    <meta content=3D"text/html; charset=3Dutf-8" http-equiv=3D"Content-Ty=
pe">
  </head>
  <body bgcolor=3D"#FFFFFF" text=3D"#000000">
    Thank you.<br>
    <br>
    I think my problem was here :<br>
    <br>
    When a file or directory is created, its owner is the user identity
    of the client process, and its group is the group of the parent
    directory (the BSD rule).<br>
    <br>
    <br>
    <br>
    <div class=3D"moz-cite-prefix">Le 09/02/2016 04:26, Harsh J a =C3=A9c=
rit=C2=A0:<br>
    </div>
    <blockquote
cite=3D"mid:CAOcnVr3LHEjD2T6unBTQb1f_FATbtyt_JoB6YO_i8BWKX=3D5L-A@mail.gm=
ail.com"
      type=3D"cite">
      <meta http-equiv=3D"Context-Type" content=3D"text/html; charset=3DU=
TF-8">
      <div dir=3D"ltr">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.</div>
      <br>
      <div class=3D"gmail_quote">
        <div dir=3D"ltr">On Mon, Feb 8, 2016 at 10:15 PM Francis Dupin
          &lt;<a moz-do-not-send=3D"true"
            href=3D"mailto:francis.dupin@ifsttar.fr">francis.dupin@ifstta=
r.fr</a>&gt;

          wrote:<br>
        </div>
        <blockquote class=3D"gmail_quote">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>
          "hadoop:supergroup"<br>
          <br>
          <br>
          Any idea ?<br>
          <br>
          Thank you<br>
          <br>
          <br>
          <br>
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        </blockquote>
      </div>
    </blockquote>
    <br>
    <pre class=3D"moz-signature" cols=3D"72">--=20
-------------------------

Francis Dupin
Bureau C106
tel : 01 81 66 83 82=20

IFSTTAR
COSYS / GRETTIA
B=C3=A2timent : Bienven=C3=BCe
14-20 Boulevard Newton - Champs-sur-Marne -=20
77447 Marne-la-Vall=C3=A9e

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