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https://issues.apache.org/jira/browse/HADOOP-8008?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13259677#comment-13259677
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Tomohiko Kinebuchi commented on HADOOP-8008:
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I become the assignee, but I cannot edit the Wiki page "HowToConfigure".
Could I have a grant to edit?
> 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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