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From "Doug Cutting (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7697) Remove dependency on different version of slf4j in avro
Date Thu, 29 Sep 2011 18:07:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7697?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13117486#comment-13117486
] 

Doug Cutting commented on HADOOP-7697:
--------------------------------------

SLF4J is a successor to commons logging.  It does not bind you to a particular logging framework
but is a meta logger like commons logging.  It fixes some serious problems in the architecture
of Commons logging.  If you just add the slf4j-log4j.jar to your classpath then slf4j uses
Log4j compatibly with everything else in Hadoop without any extra configuration.

http://articles.qos.ch/thinkAgain.html


                
> Remove dependency on different version of slf4j in avro
> -------------------------------------------------------
>
>                 Key: HADOOP-7697
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7697
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: build
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.22.0
>
>         Attachments: ivyXml-common.patch, ivyXml-common.patch
>
>
> Avro upgrade led to a mixture of slf4j versions. Hadoop uses slf4j 1.5.11, and avro brings
in 1.6.1

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