Map程序无法从多个目录中读取文件。有人能帮忙吗？我需要在每个Map器中读取一个文件。我添加了多个输入路径，并实现了自定义的wholefileinputformat，wholefilerecordreader。在map方法中，我不需要输入键。我确保每张Map都能读懂一个完整的文件。
命令行：hadoop jar autoproduce.jar autoproduce/input\u a/input\u b/output i指定了两个输入路径----1.input\u a；二输入；
运行方法片段：

Job job = new Job(getConf());
job.setInputFormatClass(WholeFileInputFormat.class);
FileInputFormat.setInputPaths(job, new Path(args[0]), new Path(args[1]));
FileOutputFormat.setOutputPath(job, new Path(args[2]));

Map方法片段：

public void map(NullWritable key, BytesWritable value, Context context){
    FileSplit fileSplit = (FileSplit) context.getInputSplit();
    System.out.println("Directory :" + fileSplit.getPath().toString());
    ......
}

自定义wholefileinputformat：

class WholeFileInputFormat extends FileInputFormat<NullWritable, BytesWritable> {
    @Override
    protected boolean isSplitable(JobContext context, Path file) {
        return false;
    }
    @Override
    public RecordReader<NullWritable, BytesWritable> createRecordReader(
        InputSplit split, TaskAttemptContext context) throws IOException,
        InterruptedException {
        WholeFileRecordReader reader = new WholeFileRecordReader();
        reader.initialize(split, context);
        return reader;
    }
}

自定义wholefilerecordreader：

class WholeFileRecordReader extends RecordReader<NullWritable, BytesWritable> {
    private FileSplit fileSplit;
    private Configuration conf;
    private BytesWritable value = new BytesWritable();
    private boolean processed = false;
    @Override
    public void initialize(InputSplit split, TaskAttemptContext context)
    throws IOException, InterruptedException {
        this.fileSplit = (FileSplit) split;
        this.conf = context.getConfiguration();
    }
    @Override
    public boolean nextKeyValue() throws IOException, InterruptedException {
        if (!processed) {
            byte[] contents = new byte[(int) fileSplit.getLength()];
            Path file = fileSplit.getPath();
            FileSystem fs = file.getFileSystem(conf);
            FSDataInputStream in = null;
            try {
                in = fs.open(file);
                IOUtils.readFully(in, contents, 0, contents.length);
                value.set(contents, 0, contents.length);
            } finally {
                IOUtils.closeStream(in);
            }
            processed = true;
            return true;
        }
        return false;
    }
    @Override
    public NullWritable getCurrentKey() throws IOException,InterruptedException {
        return NullWritable.get();
    }
    @Override
    public BytesWritable getCurrentValue() throws IOException,InterruptedException {
        return value;
    }
    @Override
    public float getProgress() throws IOException {
        return processed ? 1.0f : 0.0f;
    }
    @Override
    public void close() throws IOException {
        // do nothing
    }
}

问题：
设置两个输入路径后，所有Map任务仅从一个目录读取文件。。
提前谢谢。