There seemed to be a change between 0.20 and 0.19 API in that 0.20 no longer
set "map.input.file". config.set(), as far as I can tell, should work. I
however use the following to pass the parameters.
String[] params = new String[] { "-D", "tag1=string_value", ...}
ToolRunner(new Configuration(), someJob.class, params);
On Mon, Jan 4, 2010 at 9:52 AM, Farhan Husain <[email protected]>wrote:
> Hello all,
>
> I am using hadoop-0.20.1. I need to know the input file name in my map
> processes and pass an integer and a string to my reducer processes. I used
> the following method calls for that:
>
> config.set("tag1", "string_value");
> config.setInt("tag2", int_value);
>
> In setup() method of mapper:
> String filename =
> context.getConfiguration().get("map.input.file") // returns null
>
> In setup() method of reducer:
> String val =
> context.getConfiguration().get("tag1"); //
> returns null
> int n = context.getConfiguration().getInt("tag2",
> def_val); // returns def_val
>
> Can anyone please tell me what may be wrong with this code or anything
> related to it? Is it a bug of this version of Hadoop? Is there any
> alternative way to accomplish the same objective? I am stuck with this
> problem for about one week. I would appreciate if someone would shed some
> light on it.
>
> Thanks,
> Farhan
>
