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https://issues.apache.org/jira/browse/HADOOP-17526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17498613#comment-17498613
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Duo Zhang commented on HADOOP-17526:
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I prefer we move to Slf4jRequestLog so we can remove the HttpRequestLogAppender.

But could someone explain to me that how does this HttpRequestLogAppender work?

https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpRequestLogAppender.java

Its append method is just empty...

> HttpRequestLog should be configured via Configuration instead of 
> log4j.properties
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-17526
>                 URL: https://issues.apache.org/jira/browse/HADOOP-17526
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Akira Ajisaka
>            Priority: Major
>
> Now the log file name and retain days in HttpRequestLog is configured from 
> log4j.properties. It can be configured from Configuration instead to drop the 
> usage of log4j API.



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