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HDFS >> mail # user >> Rapid growth in Non DFS Used disk space


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Re: Rapid growth in Non DFS Used disk space

On May 13, 2011, at 10:48 AM, Todd Lipcon wrote:
>
>
>> 2) Any ideas on what is driving the growth in Non DFS Used space?   I
>> looked for things like growing log files on the datanodes but didn't find
>> anything.
>>
>
> Logs are one possible culprit. Another is to look for old files that might
> be orphaned in your mapred.local.dir - there have been bugs in the past
> where we've leaked files. If you shut down the TaskTrackers, you can safely
> delete everything from within mapred.local.dirs.

Part of our S.O.P. during Hadoop bounces is to wipe mapred.local out.  The TT doesn't properly clean up after itself.