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From Olivier Sallou <olivier.sal...@irisa.fr>
Subject Re: Problem setting super user
Date Tue, 20 Mar 2012 08:33:44 GMT


Le 3/19/12 8:00 PM, Harsh J a écrit :
> The right property for your version of Hadoop is
> "dfs.permissions.supergroup". Change the property name, restart NN,
> and your 'root' user should behave as a superuser afterwards.

It works thanks!
Wiki is however wrong, I gonna create a bug to fix the template and
documentation
> Or, you can just do "sudo -u hdfs <command>" as root.
>
> On Mon, Mar 19, 2012 at 11:02 PM, Olivier Sallou
> <olivier.sallou@irisa.fr> wrote:
>> Hi,
>> I have installed Hadoop 1.0 using .deb package.
>> I tried to configure superuser groups but it somehow fail. I do not know
>> what's wrong:
>>
>> I expect root to be able to run hadoop dfsadmin -report command.
>>
>> # id hdfs
>> uid=201(hdfs) gid=201(hdfs) groupes=123(hadoop),201(hdfs)
>> # id root
>> uid=0(root) gid=0(root) groupes=123(hadoop),0(root)
>>
>> Both my hdfs user (superuser by default) and my root user are in group
>> hadoop.
>>
>> In hdfs-site.xml I have:
>>  <property>
>>    <name>dfs.permissions.superusergroup</name>
>>    <value>hadoop</value>
>>    <description>The name of the group of super-users.</description>
>>  </property>
>>
>> I tried running refreshServiceAcl and
>> refreshSuperUserGroupsConfiguration as hdfs, but I still have the error:
>> root# hadoop dfsadmin -report
>> report: org.apache.hadoop.security.AccessControlException: Access denied
>> for user root. Superuser privilege is required
>>
>> Has anyone an idea?
>>
>> Thanks!
>>
>> Olivier
>>
>> --
>>
>> gpg key id: 4096R/326D8438  (keyring.debian.org)
>> Key fingerprint = 5FB4 6F83 D3B9 5204 6335  D26D 78DC 68DB 326D 8438
>>
>>
>
>

-- 
Olivier Sallou
IRISA / University of Rennes 1
Campus de Beaulieu, 35000 RENNES - FRANCE
Tel: 02.99.84.71.95

gpg key id: 4096R/326D8438  (keyring.debian.org)
Key fingerprint = 5FB4 6F83 D3B9 5204 6335  D26D 78DC 68DB 326D 8438



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