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https://issues.apache.org/jira/browse/HADOOP-6401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved HADOOP-6401.
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Resolution: Duplicate
HADOOP-6390 is the same problem.
> Multiple slf4j bindings cause warnings when starting DFS components
> -------------------------------------------------------------------
>
> Key: HADOOP-6401
> URL: https://issues.apache.org/jira/browse/HADOOP-6401
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 0.21.0
> Environment: Mac OS X 10.6, Java 6
> Reporter: Sean Owen
> Priority: Minor
>
> I'm getting warnings like this when starting jobs with bin/start-dfs.sh in
> Hadoop Core 0.21.0:
> localhost: SLF4J: Class path contains multiple SLF4J bindings.
> localhost: SLF4J: Found binding in
> [jar:file:/Users/srowen/Desktop/hadoop-core-0.21.0/lib/slf4j-log4j12-1.4.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> localhost: SLF4J: Found binding in
> [jar:file:/Users/srowen/Desktop/hadoop-core-0.21.0/lib/slf4j-simple-1.5.8.jar!/org/slf4j/impl/StaticLoggerBinder.class]
> localhost: SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for
> an explanation.
> Looks like one of the two jars should simply be removed. I removed the older
> log4j binding.
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