Whatever "csatAnalysis.MapClass" the compiler picked up, it appears to
not be extending the org.apache.hadoop.mapreduce.Mapper class. From
your snippets it appears that you have it all defined properly though.
A common issue here has also been that people accidentally import the
wrong API (mapred.*) but that doesn't seem to be the case either.
Can you post your full compilable source somewhere? Remove any logic
you don't want to share - we'd mostly be interested in the framework
definition parts alone.
On Sat, Feb 9, 2013 at 11:27 PM, Ronan Lehane <ronan.leh...@gmail.com> wrote:
> Hi All,
>
> I hope this is the right forum for this type of question so my apologies if
> not.
>
> I'm looking to write a map reduce program which is giving me the following
> compilation error:
> The method setMapperClass(Class<? extends Mapper>) in the type Job is not
> applicable for the arguments (Class<csatAnalysis.MapClass>)
>
> The components involved are:
>
> 1. Setting the Mapper
> //Set the Mapper for the job. Calls MapClass.class
> job.setMapperClass(MapClass.class);
>
> 2. Setting the inputFormat to TextInputFormat
> //An InputFormat for plain text files. Files are broken into lines.
> //Either linefeed or carriage-return are used to signal end of
> line.
> //Keys are the position in the file, and values are the line of
> text..
> job.setInputFormatClass(TextInputFormat.class);
>
> 3. Taking the data into the mapper and processing it
> public static class MapClass extends Mapper<LongWritable, Text, Text,
> VectorWritable> {
> public void map (LongWritable key, Text value,Context context)
> throws IOException, InterruptedException {
>
> Would anyone have any clues as to what would be wrong with the arguements
> being passed to the Mapper?
>
> Any help would be appreciated,
>
> Thanks.
--
Harsh J
