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http://issues.apache.org/jira/browse/HADOOP-738?page=comments#action_12451479 ] 
            
Doug Cutting commented on HADOOP-738:
-------------------------------------

In Hadoop, local files generally *do* have a .crc file associated with them.  
This has caught lots of data corruption problems (mostly for folks w/o ECC 
memory).

I'm okay having an option to not create crc files when exporting files, but I 
think it's the wrong fix for the problem in the description of this issue.  
Getting and putting files should work with local .crc files enabled.

> dfs get or copyToLocal should not copy crc file
> -----------------------------------------------
>
>                 Key: HADOOP-738
>                 URL: http://issues.apache.org/jira/browse/HADOOP-738
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.8.0
>         Environment: all
>            Reporter: Milind Bhandarkar
>         Assigned To: Milind Bhandarkar
>             Fix For: 0.9.0
>
>         Attachments: hadoop-crc.patch
>
>
> Currently, when we -get or -copyToLocal a directory from DFS, all the files 
> including crc files are also copied. When we -put or -copyFromLocal again, 
> since the crc files already exist on DFS, this put fails. The solution is not 
> to copy checksum files when copying to local. Patch is forthcoming.

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