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https://issues.apache.org/jira/browse/HADOOP-16206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16823842#comment-16823842
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Akira Ajisaka commented on HADOOP-16206:
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Note: In log4j1, the logger is set by "-Dhadoop.root.logger" and which sets
both the appender and log level. In contrast, log4j2 cannot set both the
appender and log level at a time. In other words, we need to have a property to
set the appender and another property to set the log level. Therefore we need
to rewrite/update some shell scripts.
> Migrate from Log4j1 to Log4j2
> -----------------------------
>
> Key: HADOOP-16206
> URL: https://issues.apache.org/jira/browse/HADOOP-16206
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Akira Ajisaka
> Assignee: Akira Ajisaka
> Priority: Major
> Attachments: HADOOP-16206-wip.001.patch
>
>
> This sub-task is to remove log4j1 dependency and add log4j2 dependency.
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