Caching 读取文件内容时出错-mapreduce

读取作为参数传递给程序的文件的内容并在控制台中显示它是我的程序的一部分。当我读取文件的内容时，我得到了一个错误。当我省略setup（）并运行我的程序时，它工作正常。但是我想显示文件的内容。下面是我的代码

package search;

import java.io.BufferedReader;
   import java.io.File;
    import java.io.FileReader;
    import java.io.IOException;
    import java.text.Format;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.StringTokenizer;

import org.apache.commons.httpclient.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.NullWritable;
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.output.FileOutputFormat;
import org.apache.hadoop.util.GenericOptionsParser;



public class search {



    public static class SearchMapper extends
            Mapper<LongWritable, Text, Text, IntWritable> {
        // Map code goes here.
        private final static IntWritable one = new IntWritable(1);
        private Text word = new Text();

        public void setup(Context context) throws IOException, InterruptedException{
            Configuration conf = context.getConfiguration();
            java.net.URI[] localPaths = context.getCacheFiles();
            BufferedReader reader = null;

            try {
                File file = new File(localPaths[0]);
                reader = new BufferedReader(new FileReader(file));

                String line;
                while ((line = reader.readLine()) != null) {
                    System.out.println(line);
                }

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }


        } 

        public void map (LongWritable Key, Text value,Context context )throws IOException,InterruptedException{

            String txt= value.toString();

                word = context.getCurrentValue();
                context.getCurrentKey();
                word.set(txt);
                context.write(word, one);

    }
    }

    public static class SearchReducer extends
            Reducer<Text, IntWritable,  Text, IntWritable> {
        // Reduce code goes here.

         private IntWritable result = new IntWritable();
            public void reduce(Text key, Iterable<IntWritable> values,
             Context context) throws IOException, InterruptedException {
                int sum = 0;
                for (IntWritable val : values) {
                   sum += val.get();
               }
               result.set(sum);
                context.write(key,result);
            }
    }

    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        String[] otherArgs = new GenericOptionsParser(conf, args)
                .getRemainingArgs();
        if (otherArgs.length != 2) {
            System.err.println("Usage: SearchCounter <in> <out>");
            System.exit(2);
        }

        Job job = Job.getInstance(new Configuration());
        job.addCacheFile(new Path("/Users/praveen/input/").toUri());
        job =new Job(conf);

        job.setJarByClass(search.class);
        job.setMapperClass(SearchMapper.class);
        job.setCombinerClass(SearchReducer.class);
        job.setReducerClass(SearchReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
        FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
        System.exit(job.waitForCompletion(true) ? 0 : 1);
    }
    }

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请指出此处的错误。

为什么在将缓存文件添加到作业后重新创建该作业？尝试删除此行：

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好的，设置是配置工作发生的地方。空指针发生在哪一行。请提一下。它的第59行与异常一致，但那一行是什么：）@ramzy-第59行是reader.close（）。当我删除那一行时，我得到下面的错误。当我删除那一行时，我得到下面的错误。线程“main”java.lang.NoClassDefFoundError中的异常：com/google/protobuf/MessageOrBuilder位于java.lang.Class.forName0（本机方法）位于org.apache.hadoop.conf.Configuration.getClassByNameOrNull（Configuration.java:1659）的org.apache.hadoop.conf.Configuration.getClassByName（Configuration.java:1624）的java.lang.Class.forName（Class.java:270）…不确定它是否会修复pb，但映射器/还原器类中缺少@override注释。那个罐子不见了。除此之外，尝试调试并查看流是如何移动的，以及哪些因素导致了错误。

java.lang.Exception: java.lang.NullPointerException
    at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:403)
Caused by: java.lang.NullPointerException
    at search.search$SearchMapper.setup(search.java:59)
    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:142)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
    at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:235)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:724)
2015-06-06 17:00:42,907 INFO  [main] mapreduce.Job (Job.java:monitorAndPrintJob(1338)) - Job job_local1148982887_0001 running in uber mode : false
2015-06-06 17:00:42,909 INFO  [main] mapreduce.Job (Job.java:monitorAndPrintJob(1345)) -  map 0% reduce 0%
2015-06-06 17:00:42,912 INFO  [main] mapreduce.Job (Job.java:monitorAndPrintJob(1358)) - Job job_local1148982887_0001 failed with state FAILED due to: NA
2015-06-06 17:00:42,921 INFO  [main] mapreduce.Job (Job.java:monitorAndPrintJob(1363)) - Counters: 0

    job =new Job(conf);