对MapWritable产生荒谬结果进行迭代和求和

如何解决对MapWritable产生荒谬结果进行迭代和求和

这是我的映射器的输出

让{test = 1，播放= 1，让= 2，我= 2，您= 1}

让{test = 2，let = 1，me = 2，you = 2}

测试{play = 1，let = 3，me = 2，you = 1}

test {test = 1，let = 2，me = 2，you = 2}

您{test = 1，玩1，让= 3，我= 2}

您{test = 2，let = 2，me = 2，you = 1}

public static class TokenizerMapper extends Mapper<Object,Text,MapWritable>

    public static class IntSumReducer extends Reducer<Text,MapWritable,MapWritable> {

        MapWritable incrementingMap = new MapWritable();
    
        //reduce method
        public void reduce(Text key,Iterable<MapWritable> values,Context context) throws IOException,InterruptedException
        {   

在操作Iterable值时，我感到非常困惑

我想接收具有相同键的所有值的总和。例如，就我而言

{test = 1，播放= 1，让= 2，我= 2，您= 1}

{test = 2，let = 1，me = 2，you = 2}

SUM = 14。

我正在使用以下方法来获取键中元素的累积总和

        private void addall(MapWritable mapWritable)
        {
            Set<Writable> keys = mapWritable.keySet();
            
            for(Writable key: keys)
            {
                IntWritable val = (IntWritable)mapWritable.get(key);
                if(incrementingMap.containsKey(key))
                {       
                    IntWritable count = (IntWritable)incrementingMap.get(key);
                    count.set(count.get()+val.get());
                }
                else
                {
                    incrementingMap.put(key,val);
                }
            }   
        }

输出结果显示： incrementingMap

让{test = 3，play = 1，let = 3，me = 4，you = 3}

现在我遍历这些元素以求和

            Set<Writable> keys = incrementingMap.keySet();
            
            for(Writable mykey : keys)
            {
                IntWritable val = (IntWritable)incrementingMap.get(mykey);
                result = result + val.get();
            }

但这会为键“ let”返回28。

如果我在做

result = result/2;

incrementingMap.put(new Text("result_final"),new IntWritable(result));

result_final = 10

我很困惑：

1-增量映射的所有元素之和的输出应为14，结果为28。

2-当我执行结果/ 2（28/2）时，我得到10。

你能解释我在做什么错吗？