问题是它在描述中说了什么。我有一些密码。
这是减速机。

public class RTopLoc extends Reducer<CompositeKey, IntWritable, Text, Text> {
    private static int number = 0;
    private static CompositeKey lastCK = new CompositeKey();
    private static Text lastLac = new Text();

    @Override
    public void reduce(CompositeKey key, Iterable<IntWritable> values, Context context) throws IOException, InterruptedException {
        int sum = sumValues(values);
        String str = Integer.toString(sum);
        String str2 = Integer.toString(number);
        String str3 = key.getSecond().toString();
        context.write(key.getFirst(), new Text(str3 + " " + str2 + " " + str));
        if(number == 0){
            number = sum;
            lastCK = key;
            context.write(new Text("1"), new Text("1"));
        }
        else if(lastCK.getFirst().equals(key.getFirst()) && sum > number){
            lastCK = key;
            context.write(new Text("2"), new Text("2"));
        }
        else if(!lastCK.getFirst().equals(key.getFirst())){
//            context.write(lastCK.getFirst(), lastCK.getSecond());
            context.write(new Text("3"), new Text("3"));
            number = sum;
            lastCK = key;

        }
    }

它运行良好，直到减速机。然后，当我在intelij idea（windows）中运行它时，我得到

0000000000 44137 0 2
1 1
902996760100000 44137 2 6
3 3
9029967602 44137 6 8
3 3
90299676030000 44137 8 1
3 3
9029967604 44137 1 5
3 3
905000 38704 5 1
3 3
9050000001 38702 1 24
3 3
9050000001 38704 24 14
9050000001 38705 24 12
9050000001 38706 24 13
9050000001 38714 24 24
9050000002 38704 24 12
3 3
9050000002 38706 12 12
9050000011 38704 12 6
3 3
9050000011 38706 6 12
2 2
9050000021 38702 6 12
3 3
9050000031 38704 12 6
3 3
9050000031 38705 6 6
9050000031 38714 6 12
2 2

在我打包代码（我使用maven）并在hadoop（linux）上运行之后，我得到了

0000000000  44137 0 2
1   1
902996760100000 44137 2 6
2   2
9029967602  44137 2 8
2   2
90299676030000  44137 2 1
9029967604  44137 2 5
2   2
905000  38704 2 1
9050000001  38702 2 24
2   2
9050000001  38704 2 14
2   2
9050000001  38705 2 12
2   2
9050000001  38706 2 13
2   2
9050000001  38714 2 24
2   2
9050000002  38704 2 12
2   2
9050000002  38706 2 12
2   2
9050000011  38704 2 6
2   2
9050000011  38706 2 12
2   2
9050000021  38702 2 12
2   2
9050000031  38704 2 6
2   2
9050000031  38705 2 6
2   2
9050000031  38714 2 12
2   2

我用这个来运行代码。

hadoop jar Project.jar inputPath outputPath