Your import line of Mapper has the issue. It is imported as below, which can probably be removed as it is unnecessary:
import org.apache.hadoop.mapreduce.Mapper.Context; But you also would need the line below for the actual class to get found: import org.apache.hadoop.mapreduce.Mapper; Adding that line to your list of imports should help resolve it. I recall some IDEs being odd about these things sometimes, and not reporting the real error correctly. Were you using one? Eclipse? On Sat, Feb 9, 2013 at 11:47 PM, Ronan Lehane <ronan.leh...@gmail.com> wrote: > Hi Harsh, > > Thanks for getting back so quickly. > > The full source code is attached as there's nothing sensitive in it. > Coding wouldn't be my strong point so apologies in advance if it looks a > mess. > > Thanks > > > On Sat, Feb 9, 2013 at 6:09 PM, Harsh J <ha...@cloudera.com> wrote: >> >> 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 > > -- Harsh J