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https://issues.apache.org/jira/browse/HADOOP-13344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15419298#comment-15419298
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Thomas Poepping commented on HADOOP-13344:
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this seems like a different issue, but I understand what you're saying. as it
stands now, it looks like hadoop-mapreduce-project, hadoop-mapreduce-client,
and hadoop-minikdc all have the slf4j binding as a compile dependency, rather
than a runtime dependency. changing this would exclude it for dependent
projects.
I would recommend a different JIRA for this issue, however, because this is not
the issue I'm trying to solve here. The issue I'm trying to solve is that
hadoop-config.sh will place the slf4j binding on the classpath no matter what.
Applications that must be installed with hadoop to function (e.g. hive) will
end up having Hadoop's slf4j-binding on their classpath, even if they don't
want it there. This option would give the opportunity, in this instance, to
remove that dependency from the classpath.
> Add option to exclude Hadoop's SLF4J binding
> --------------------------------------------
>
> Key: HADOOP-13344
> URL: https://issues.apache.org/jira/browse/HADOOP-13344
> Project: Hadoop Common
> Issue Type: New Feature
> Components: bin, scripts
> Affects Versions: 2.8.0, 2.7.2
> Reporter: Thomas Poepping
> Assignee: Thomas Poepping
> Labels: patch
> Attachments: HADOOP-13344.patch
>
>
> If another application that uses the Hadoop classpath brings in its own SLF4J
> binding for logging, and that jar is not the exact same as the one brought in
> by Hadoop, then there will be a conflict between logging jars between the two
> classpaths. This patch introduces an optional setting to remove Hadoop's
> SLF4J binding from the classpath, to get rid of this problem.
> This patch should be applied to 2.8.0, as bin/ and hadoop-config.sh structure
> has been changed in 3.0.0.
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