How do multiple reducers output only one part-file in Hadoop?

Question

In my map-reduce job, I use 4 reducers to implement the reducer jobs. So by doing this, the final output will generate 4 part-files.: part-0000 part-0001 part-0002 part-0003

Answer 1

MultipleOutputs.addNamedOutput(conf, "text", TextOutputFormat.class,
 LongWritable.class, Text.class);

Here text is output directory or single large file named text ?