Hadoop Map-Reduce , Need to combine two mapper with one common Reducer
MultipleInputs.addInputPath is what you are looking for. This is how your configuration would look like. Make sure both AnyMapper1 and AnyMapper2 write the same output expected by MergeReducer
JobConf conf = new JobConf(Merge.class);conf.setJobName("merge");conf.setOutputKeyClass(IntWritable.class); conf.setOutputValueClass(Text.class); conf.setReducerClass(MergeReducer.class);conf.setOutputFormat(TextOutputFormat.class);MultipleInputs.addInputPath(conf, inputDir1, SequenceFileInputFormat.class, AnyMapper1.class);MultipleInputs.addInputPath(conf, inputDir2, TextInputFormat.class, AnyMapper2.class);FileOutputFormat.setOutputPath(conf, outputPath);