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Date: Tue, 24 Apr 2012 19:49:36 +0000 (UTC)
From: "Eli Collins (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-8008) Document how to change the default
 loglevels
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    [ https://issues.apache.org/jira/browse/HADOOP-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260884#comment-13260884 ] 

Eli Collins commented on HADOOP-8008:
-------------------------------------

Hi Tomohiko, I gave you perms to edit the wiki.

Thanks,
Eli
                
> Document how to change the default loglevels
> --------------------------------------------
>
>                 Key: HADOOP-8008
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8008
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: documentation
>            Reporter: Eli Collins
>            Assignee: Tomohiko Kinebuchi
>              Labels: newbie
>
> The hadoop.root.logger defined in log4j.properties is only used by applications. The scripts (bin and daemons) always set it to HADOOP_ROOT_LOGGER or "INFO,console" so the installed log4j.properties appears to be ignored. The wiki doesn't cover this:
> http://wiki.apache.org/hadoop/HowToConfigure
> We should update the cluster setup docs to indicate how the loglevel is configured and also add a comment in log4j.properties that the hadoop.root.logger defined there is not used by Hadoop itself, that HADOOP_ROOT_LOGGER must be set. This is relevant for commands and daemons, though the latter also has daemonlog (http://hadoop.apache.org/common/docs/current/commands_manual.html#daemonlog).

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