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https://issues.apache.org/jira/browse/MAPREDUCE-4970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13630756#comment-13630756
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yeshavora commented on MAPREDUCE-4970:
--------------------------------------
This patch is not compatible with older version. The main impact of this change
is syslogs are missing on clusters which are configured with just
log4j.properties. Also, stderr has the following WARN message:
log4j:WARN No appenders could be found for logger
(org.apache.hadoop.mapred.Child).
log4j:WARN Please initialize the log4j system properly.
> Child tasks (try to) create security audit log files
> ----------------------------------------------------
>
> Key: MAPREDUCE-4970
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4970
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 1.1.1
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Fix For: 1.2.0
>
> Attachments: MAPREDUCE-4970-1.patch, MAPREDUCE-4970.patch,
> MAPREDUCE-4970.patch
>
>
> After HADOOP-8552, MR child tasks will attempt to create security audit log
> files with their user names. On an insecure cluster, this has no effect, but
> on a secure cluster, log4j will try to create log files for tasks with names
> like SecurityAuth-joeuser.log.
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