javac不会在hadoop中生成任何错误或jar文件

Question

我研究hdfs，所以我测试了简单的MapReduce代码，它在JSON文件中得到了整体的平均值。

Json表格的样本位于here(click me)

GetAverage.java

package some.package.path.here.bigdata;

import java.io.IOException;
import java.util.Arrays;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.FloatWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

import org.json.*;

public class GetAverage extends Configured implements Tool {
    public static void main(String[] args) throws Exception {
        System.out.println(Arrays.toString(args));
        int res = ToolRunner.run(new Configuration(), new GetAverage(), args);

        System.exit(res);
    }

    @Override
    public int run(String[] args) throws Exception {
        System.out.println(Arrays.toString(args));

        Job job = Job.getInstance(getConf());
        job.setJarByClass(GetAverage.class);
        job.setOutputKeyClass(Text.class);
        //Overall value type is float.
        job.setOutputValueClass(FloatWritable.class);

        job.setMapperClass(Map.class);
        job.setReducerClass(Reduce.class);

        job.setInputFormatClass(TextInputFormat.class);
        job.setOutputFormatClass(TextOutputFormat.class);

        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));

        job.waitForCompletion(true);

        return 0;
    }

    public static class Map extends Mapper<LongWritable, Text, Text, FloatWritable> {
        private Text asin_value = new Text();
        private FloatWritable overall_value = new FloatWritable();

        @Override
        public void map(LongWritable key, Text value, Context context)
                throws IOException, InterruptedException {

            String asin;
            float overall;
            String line = value.toString();
            String[] tuple = line.split("\\n");

            try{
                for(int i=0; i<tuple.length; i++){
                    JSONObject obj = new JSONObject(tuple[i]);
                    System.out.println(obj);
                    asin = obj.getString("asin");
                    overall = Float.parseFloat(obj.getString("overall"));

                    asin_value.set(asin);
                    overall_value.set(overall);

                    context.write(asin_value, overall_value);
                }
            }catch(JSONException e){
                e.printStackTrace();
            }
        }
    }

    public static class Reduce extends Reducer<Text, FloatWritable, Text, FloatWritable> {
        @Override
        public void reduce(Text key, Iterable<FloatWritable> values, Context context)
                throws IOException, InterruptedException {
            float sum = 0;
            int length = 0;
            for (FloatWritable val : values) {
                sum += val.get();
                length++;
            }
            float average = sum / length;
            context.write(key, new FloatWritable(average));
        }
    }
}

编译时，代码不显示任何消息并生成任何jar文件。

我用under命令编译这个java文件。

cat ./complie command

  

javac -classpath /usr/local/hadoop/share/hadoop/common/hadoop-common-2.8.0.jar:/usr/local/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core- 2.8.0.jar：../ org.json.jar -d getaverage_classes / GetAverage.java

我的目录结构是......

~/test |- GetAverage.java
       |- compile_command
       |- getaverage_classes - some/package/path/here/bigdata |-GetAverage$Map.class
                                                              |- GetAverage$Reduce.class
                                                              |- GetAverage.class

请回答我的问题，任何人都知道这个问题。 ：）