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https://issues.apache.org/jira/browse/HADOOP-8865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18017138#comment-18017138
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ASF GitHub Bot commented on HADOOP-8865:
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slfan1989 commented on PR #7737:
URL: https://github.com/apache/hadoop/pull/7737#issuecomment-3238389136

   > @zabetak and @slfan1989 , sorry, I think we may need to revert #7766 and 
#7737 . I noticed that all of the deprecation warnings are coming out in shell 
command output, which is unexpected and may break scripting. These are warnings 
for properties declared in core-default.xml, so they aren't easily within the 
user's control.
   
   @cnauroth Thank you for your feedback. I believe rolling back is a feasible 
option. @zabetak, we really appreciate your contributions, but it seems this 
has affected some functionality, and a rollback is necessary. If we find a 
better solution, we will assist with the review.




> log warn when loading deprecated properties
> -------------------------------------------
>
>                 Key: HADOOP-8865
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8865
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: conf
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Jianbin Wei
>            Assignee: Stamatis Zampetakis
>            Priority: Major
>              Labels: BB2015-05-TBR, newbie, pull-request-available
>             Fix For: 3.5.0
>
>         Attachments: HADOOP-8865.patch, HADOOP-8865.patch, HADOOP-8865.patch
>
>
> We need to log warn when loading deprecated properties. 



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