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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-6401) Multiple slf4j bindings cause warnings when starting DFS components
Date Tue, 01 Dec 2009 12:25:20 GMT
Multiple slf4j bindings cause warnings when starting DFS components
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                 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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