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From Allen Wittenauer <awittena...@linkedin.com>
Subject Re: [JIRA] (COLL-117) seeing warnings "attempt to override final parameter: dfs.data.dir" in tasktracker logs
Date Mon, 21 Jun 2010 18:32:52 GMT

Again, removing a bunch of CC:'es.

On Jun 21, 2010, at 2:26 AM, Bikash Singhal wrote:

> 
> Hi Hadoopers,
> 
> I have received WARN in the hadoop cluster. Has anybody seen this . Any solution?
> 
> 
>> 2010-06-06 01:45:04,079 WARN org.apache.hadoop.conf.Configuration: /var/lib/hadoop-0.20/cache/hadoop/mapred/local/taskTracker/jobcache/job_201006060025_0003/job.xml:a
attempt to override final parameter: dfs.data.dir;  Ignoring.
>> ....
>> 2010-06-06 01:49:41,501 WARN org.apache.hadoop.conf.Configuration: /var/lib/hadoop-0.20/cache/hadoop/mapred/local/taskTracker/jobcache/job_201006060025_0004/job.xml:a
attempt to override final parameter: dfs.data.dir;  Ignoring.


It means your client has 'dfs.data.dir' in its hadoop config.  On the server side, it is marked
as final, which means the client can't override the value.  This message is completely harmless
for this particular parameter.



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