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https://issues.apache.org/jira/browse/HADOOP-10288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13884144#comment-13884144
 ] 

Hudson commented on HADOOP-10288:
---------------------------------

SUCCESS: Integrated in Hadoop-Hdfs-trunk #1656 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1656/])
HADOOP-10288. Explicit reference to Log4JLogger breaks non-log4j users. 
Contributed by Todd Lipcon. (todd: 
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1561882)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* 
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpRequestLog.java


> Explicit reference to Log4JLogger breaks non-log4j users
> --------------------------------------------------------
>
>                 Key: HADOOP-10288
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10288
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 2.4.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>             Fix For: 2.4.0
>
>         Attachments: hadoop-10288.txt
>
>
> In HttpRequestLog, we make an explicit reference to the Log4JLogger class for 
> an instanceof check. If the log4j implementation isn't actually on the 
> classpath, the instanceof check throws NoClassDefFoundError instead of 
> returning false. This means that dependent projects that don't use log4j can 
> no longer embed HttpServer -- typically this is an issue when they use 
> MiniDFSCluster as part of their testing.



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