mapreduce run后输出显示空文件

 希望大佬能解决一下

//map代码段
import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

public class PMMap extends Mapper<Text, LongWritable, Text, PM>{
	@Override
	protected void map(Text key, LongWritable value, Context context)
			throws IOException, InterruptedException {
		String keys =value.toString();
		String[] file = keys.split(",");
		String cs = file[16];
		int pm = Integer.parseInt(file[3]);
		context.write(new Text(cs), new PM(cs, pm));
	}

}

//reduce代码段

import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

public class PMReduce extends Reducer<Text, PM, Text, LongWritable>{
@Override
protected void reduce(Text key, Iterable<PM> value, Context context)
		throws IOException, InterruptedException {
	int pm = 0;
//	int time = 0;
	for (PM pm2 : value) {
//		time++;
		pm+= pm2.getPm();
		
	}
	context.write(key, new LongWritable(pm));
}
}

//run代码段
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;


public class PMRun {
	public static void main(String[] args)throws IOException ,ClassNotFoundException,InterruptedException{
		Configuration configuration=new Configuration();
		Job job=Job.getInstance(configuration);
		job.setJarByClass(PMRun.class);

		job.setMapperClass(PMMap.class);
		job.setReducerClass(PMReduce.class);

		job.setOutputKeyClass(Text.class);
		job.setOutputValueClass(LongWritable.class);

		job.setMapOutputKeyClass(Text.class);
		job.setMapOutputValueClass(PM.class);

		FileInputFormat.setInputPaths(job, "hdfs://hadoop01:9000/tmp/input");
		FileOutputFormat.setOutputPath(job, new Path("hdfs://hadoop01:9000/tmp/output"));

		job.waitForCompletion(true);
}
}