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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