May be your  "issplittable to false" is being overwritten. 

On Dec 3, 2013, at 10:06 AM, Adam Kawa <[email protected]> wrote:

> 
> I have override the InputFormat and set the isspitable to return false.
> My entire file has to go one mapper only as I set the issplitable false?
> 
> Yes.
> 
> 1) Could you double-check that you have only 1 input file in the input 
> directory.
> 2) Did you configure your job to use your custom InputFormat (instead of the 
> default one)?
> 

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