Hbase中的输出表为空

Question

我正在尝试从一个表中读取数据，进行一些处理并将结果放在另一个表中。这个代码是

'package examples;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;
import org.apache.hadoop.hbase.mapreduce.TableMapper;
import org.apache.hadoop.hbase.mapreduce.TableReducer;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.FloatWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;


public class HbaseCombinerExample {

    public static class MyMapper extends TableMapper<Text, FloatWritable> {

        private Text text = new Text();

        public void map(ImmutableBytesWritable row, Result value,Context context) throws IOException, InterruptedException {
            int[] siteArray = {1, 8, 18, 22, 26, 35, 48, 51, 53, 81, 108, 110, 139, 146, 150, 154, 169, 181, 235, 240, 404, 405, 406, 407, 409, 410, 411, 671, 673, 695, 697, 698, 1001};

            String siteId = new String(value.getValue(Bytes.toBytes("location"), Bytes.toBytes("site")));
            String param = new String(value.getValue(Bytes.toBytes("data"), Bytes.toBytes("param_name")));
            boolean bool = Arrays.asList(siteArray).contains(Integer.parseInt(siteId));

            if(bool && param.equals("o3")) {

                String year = new String(value.getValue(Bytes.toBytes("date"), Bytes.toBytes("year")));
                String month = new String(value.getValue(Bytes.toBytes("date"), Bytes.toBytes("month")));



String day = new String(value.getValue(Bytes.toBytes("date"), Bytes.toBytes("day")));
                String hour = new String(value.getValue(Bytes.toBytes("date"), Bytes.toBytes("hour")));
                String pollution = new String(value.getValue(Bytes.toBytes("data"), Bytes.toBytes("value")));

                String val = year+month+day+hour+siteId;
                FloatWritable pollValue = new FloatWritable(Float.parseFloat(pollution));

                text.set(val); // we can only emit Writables...

                context.write(text, pollValue);
            }
        }
    }

    public static class MyTableReducer extends TableReducer<Text, FloatWritable, ImmutableBytesWritable> {

        public void reduce(Text key, Iterable<FloatWritable> values, Context context) throws IOException, InterruptedException {
            float i = 0;
            float count = 0;
           // ImmutableBytesWritable HKey = new ImmutableBytesWritable(Bytes.toBytes(key.toString()));

            for (FloatWritable val : values) {
                i += val.get();
             //   ++count;
            }

           // float avgPollution = i/count;
            Put HPut = new Put(Bytes.toBytes(key.toString()));
            HPut.add(Bytes.toBytes("data"), Bytes.toBytes("avgPollutionValue"),Bytes.toBytes(i));

            context.write(null, HPut);
         }
    }

    public static void main(String[] args) throws Exception {
Configuration config = HBaseConfiguration.create();
            Job job = new Job(config, "HourlyAvg");
            job.setJarByClass(HbaseCombinerExample.class);

            String sourceTable = "airqualitys1";
            String targetTable = "bigd26-hbase-avg";
            Scan scan = new Scan();
            scan.setCaching(300); // 1 is the default in Scan, which will be bad for MapReduce jobs
            scan.setCacheBlocks(false);

            TableMapReduceUtil.initTableMapperJob(sourceTable,scan, MyMapper.class,Text.class, FloatWritable.class, job);
            TableMapReduceUtil.initTableReducerJob(targetTable, MyTableReducer.class, job);
            job.setNumReduceTasks(1);
            boolean b = job.waitForCompletion(true);

            if (!b) {
                      throw new IOException("error with job!");
            }
     }

}'

问题是输出表中没有记录。当地图缩小运行时，我也得到这一行。

'任务ID：attempt_1397249742212_1380_m_000001_0，状态：FAILED'和  '无法在app_1397249742212_1407的任何已配置本地目录中初始化app-log目录'

任何信息/建议都会非常有用。