How to use custom FileInputFormat in MapReduce

Question

How do I create a custom FileInputFormat to send the whole file as a single record to Mapper?

Answer 1

You have to override isSplitable method.

        @Override
        protected boolean isSplitable(JobContext context, Path filename) {
            return false;
        }

Go through this Hadoop source code example, MultiFileWordCount. You have to override isSplitable method to avoid splits.