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https://issues.apache.org/jira/browse/HADOOP-2644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harsh J resolved HADOOP-2644.
-----------------------------

    Resolution: Won't Fix

I disagree that we should remove this. It may be noise to a developer, but its 
good information for those who need to maintain and support them. Its a great 
indicator sometimes that the client configs are tweaked or are out of sync. 
There are a lot of other benefits I've seen as a result of this in the field.

However, we (very recently) did stop logging that if the overriding value is 
the same.
                
> Remove the warning for attempting to override a final parameter
> ---------------------------------------------------------------
>
>                 Key: HADOOP-2644
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2644
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Owen O'Malley
>
> We should remove the warning that final configuration attributes are being 
> overridden. 
> In particular, in the task's logs, I get:
> {code}
> 2008-01-17 10:40:43,659 WARN org.apache.hadoop.conf.Configuration: 
> /Users/oom/var/hadoop-trial/mapred/local/taskTracker/jobcache/job_200801171039_0001/task_200801171039_0001_m_000000_0/job.xml:a
>  attempt to override final parameter: dfs.client.buffer.dir;  Ignoring.
> 2008-01-17 10:40:43,661 WARN org.apache.hadoop.conf.Configuration: 
> /Users/oom/var/hadoop-trial/mapred/local/taskTracker/jobcache/job_200801171039_0001/task_200801171039_0001_m_000000_0/job.xml:a
>  attempt to override final parameter: hadoop.run.dir;  Ignoring.
> 2008-01-17 10:40:43,661 WARN org.apache.hadoop.conf.Configuration: 
> /Users/oom/var/hadoop-trial/mapred/local/taskTracker/jobcache/job_200801171039_0001/task_200801171039_0001_m_000000_0/job.xml:a
>  attempt to override final parameter: mapred.local.dir;  Ignoring.
> 2008-01-17 10:40:43,661 WARN org.apache.hadoop.conf.Configuration: 
> /Users/oom/var/hadoop-trial/mapred/local/taskTracker/jobcache/job_200801171039_0001/task_200801171039_0001_m_000000_0/job.xml:a
>  attempt to override final parameter: mapred.temp.dir;  Ignoring.
> 2008-01-17 10:40:43,662 WARN org.apache.hadoop.conf.Configuration: 
> /Users/oom/var/hadoop-trial/mapred/local/taskTracker/jobcache/job_200801171039_0001/task_200801171039_0001_m_000000_0/job.xml:a
>  attempt to override final parameter: mapred.system.dir;  Ignoring.
> {code}
> which is just noise from the user's point of view. 

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