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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6401) Multiple slf4j bindings cause warnings when starting DFS components
Date Tue, 01 Dec 2009 15:11:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12784259#action_12784259
] 

Konstantin Boudnik commented on HADOOP-6401:
--------------------------------------------

I see the same set of warnings in some HDFS tests, too.

> 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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