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https://issues.apache.org/jira/browse/HADOOP-9487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13677905#comment-13677905
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Steve Loughran commented on HADOOP-9487:
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patch looks good, though I'd have the default for deprecation warnings to be 
on. That is their goal: to warn of things about to go away. 

# the line in the log4j file could be commented out, with a line above saying 
"uncomment to turn off warnings"
# the javadocs of configuration should mention this too
                
> Deprecation warnings in Configuration should go to their own log or otherwise 
> be suppressible
> ---------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9487
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9487
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 3.0.0
>            Reporter: Steve Loughran
>         Attachments: HADOOP-9487.patch
>
>
> Running local pig jobs triggers large quantities of warnings about deprecated 
> properties -something I don't care about as I'm not in a position to fix 
> without delving into Pig. 
> I can suppress them by changing the log level, but that can hide other 
> warnings that may actually matter.
> If there was a special Configuration.deprecated log for all deprecation 
> messages, this log could be suppressed by people who don't want noisy logs

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