我已经使用hbase export实用工具备份了hbase表。

hbase org.apache.hadoop.hbase.mapreduce.Export "FinancialLineItem" "/project/fricadev/ESGTRF/EXPORT"

这已经启动了mapreduce并将我的所有表数据传输到输出文件夹中。根据文件，输出文件的文件格式为序列文件。所以我运行下面的代码从文件中提取密钥和值。
现在我想运行mapreduce从输出文件中读取键值，但得到以下异常
java.lang.exception:java.io.ioexception:找不到值类的反序列化程序：“org.apache.hadoop.hbase.client.result”。如果使用自定义序列化，请确保配置“io.serializations”配置正确。在org.apache.hadoop.mapred.localjobrunner$job.run（localjobrunner。java:406)原因：java.io.ioexception:找不到值类的反序列化程序：“org.apache.hadoop.hbase.client.result”。如果使用自定义序列化，请确保配置“io.serializations”配置正确。在org.apache.hadoop.io.sequencefile$reader.init（sequencefile。java:1964)在org.apache.hadoop.io.sequencefile$reader.initialize（sequencefile。java:1811)在org.apache.hadoop.io.sequencefile$reader。java:1760)在org.apache.hadoop.io.sequencefile$reader。java:1774)在org.apache.hadoop.mapreduce.lib.input.sequencefilerecordreader.initialize（sequencefilerecordreader）。java:50)在org.apache.hadoop.mapred.maptask$newtrackingrecordreader.initialize（maptask。java:478)在org.apache.hadoop.mapred.maptask.runnewmapper（maptask。java:671)在org.apache.hadoop.mapred.maptask.run（maptask。java:330)
这是我的司机代码

package SEQ;

import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
public class SeqDriver extends Configured implements Tool 
{
    public static void main(String[] args) throws Exception{
        int exitCode = ToolRunner.run(new SeqDriver(), args);
        System.exit(exitCode);
    }

    public int run(String[] args) throws Exception {
        if (args.length != 2) {
            System.err.printf("Usage: %s needs two arguments   files\n",
                    getClass().getSimpleName());
            return -1;
        }
        String outputPath = args[1];

        FileSystem hfs = FileSystem.get(getConf());
        Job job = new Job();
        job.setJarByClass(SeqDriver.class);
        job.setJobName("SequenceFileReader");

        HDFSUtil.removeHdfsSubDirIfExists(hfs, new Path(outputPath), true);

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

        job.setOutputKeyClass(ImmutableBytesWritable.class);
        job.setOutputValueClass(Result.class);
        job.setInputFormatClass(SequenceFileInputFormat.class);

        job.setMapperClass(MySeqMapper.class);

        job.setNumReduceTasks(0);

        int returnValue = job.waitForCompletion(true) ? 0:1;

        if(job.isSuccessful()) {
            System.out.println("Job was successful");
        } else if(!job.isSuccessful()) {
            System.out.println("Job was not successful");           
        }

        return returnValue;
    }
}

这是我的Map代码

package SEQ;

import java.io.IOException;

import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

public class MySeqMapper extends Mapper <ImmutableBytesWritable, Result, Text, Text>{

    @Override
    public void map(ImmutableBytesWritable row, Result value,Context context)
    throws IOException, InterruptedException {
    }
  }