Hi Gaurav How many input files are there for the wordcount map reduce job? Do you have input files lesser than a block size? If you are using the default TextInputFormat there will be one task generated per file for sure, so if you have files less than block size the calculation specified here for number of splits won't hold. If small files are there then definitely the number of maps tasks should be more.
Also did you change the split sizes as well along with block size? Regards Bejoy KS
