我将hbase 0.94.8与hdfs一起使用。我实现了协处理器来求和值。该表只有两行
hbase（主）：043:0>扫描“演示”
行-列+单元格
行1列=info:category，时间戳=1375438808010，值=web
行1列=info:hits，时间戳=1375438797824，值=123
行2列=info:category，时间戳=1375438834518，值=邮件
行2列=info:hits，时间戳=1375438822093，值=1321
hbase（main）：043:0>描述“演示”
'demo'，{method=>'table_att'，协处理器$1=>'| org.apache.hadoop.hbase.coprocess true
或.aggregateimplementation | |'}，{name=>'info'，data_block_encoding=>'none'，bloo mfilter=>'none'，replication_scope=>'0'，versions=>'3'，compression=>'none'，
最小版本=>'0'，ttl=>'2147483647'，保留删除的单元格=>'false'，块大小=>'65536'，在内存中=>'false'，在磁盘上编码=>'true'，块缓存=>'true'}1行，0.0670秒
我的代码如下：

import org.apache.hadoop.conf.Configuration; 
import org.apache.hadoop.hbase.HBaseConfiguration; 
import org.apache.hadoop.hbase.HColumnDescriptor; 
import org.apache.hadoop.hbase.HTableDescriptor; 
import org.apache.hadoop.hbase.KeyValue; 
import org.apache.hadoop.hbase.client.HBaseAdmin; 
import org.apache.hadoop.hbase.client.HTable; 
import org.apache.hadoop.hbase.client.Result; 
import org.apache.hadoop.hbase.client.ResultScanner; 
import org.apache.hadoop.hbase.client.Scan; 
import org.apache.hadoop.hbase.client.coprocessor.AggregationClient; 
import org.apache.hadoop.hbase.client.coprocessor.LongColumnInterpreter;
import org.apache.hadoop.hbase.util.Bytes; 
import org.apache.hadoop.hbase.coprocessor.ColumnInterpreter; 
import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;

public class webAggregator {

   // private static final byte[] EDRP_FAMILY = Bytes.toBytes("EDRP");
   // private static final byte[] EDRP_QUALIFIER = Bytes.toBytes("advanceKWh");
   public static void testSumWithValidRange(Configuration conf,
                 String[] otherArgs) throws Throwable {
          byte[] EDRP_TABLE = Bytes.toBytes(otherArgs[0]);
          byte[] EDRP_FAMILY = Bytes.toBytes(otherArgs[1]);
          byte[] EDRP_QUALIFIER = Bytes.toBytes(otherArgs[2]);

          conf.set("hbase.zookeeper.quorum", "master");
          conf.set("hbase.zookeeper.property.clientPort", "2222");

          conf.setLong("hbase.rpc.timeout", 600000);

          conf.setLong("hbase.client.scanner.caching", 1000);
          conf.set(CoprocessorHost.REGION_COPROCESSOR_CONF_KEY,
                       "org.apache.hadoop.hbase.coprocessor.AggregateImplementation");

          // Utility.CreateHBaseTable(conf, otherArgs[1], otherArgs[2], true);
          /*HBaseAdmin admin = new HBaseAdmin(conf);
          HTableDescriptor desc = new HTableDescriptor(EDRP_TABLE);
          desc.addFamily(new HColumnDescriptor(EDRP_FAMILY));
          admin.createTable(desc);*/

          AggregationClient aClient = new AggregationClient(conf);
          Scan scan = new Scan();
          scan.addColumn(EDRP_FAMILY, EDRP_QUALIFIER);

          HTable table = new HTable(conf, "demo");
          Scan s = new Scan();
          ResultScanner ss = table.getScanner(s);
          for(Result r:ss){
              for(KeyValue kv : r.raw()){
                 System.out.print(new String(kv.getRow()) + " ");
                 System.out.print(new String(kv.getFamily()) + ":");
                 System.out.print(new String(kv.getQualifier()) + " ");
                 System.out.print(kv.getTimestamp() + " ");
                 System.out.println(new String(kv.getValue()));
              }
          }

          final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
          long sum = aClient.sum(Bytes.toBytes(otherArgs[0]), ci, scan);
          System.out.println(sum);
   }

   /**
   * Main entry point.
   *
   * @param argsThe
   *            command line parameters.
   * @throws Exception
   *             When running the job fails.
   */
   public static void main(String[] args) throws Exception {
     Configuration conf = HBaseConfiguration.create();
       String[] otherArgs ={"demo","info","hits"};
      try {
         testSumWithValidRange(conf, otherArgs);
       } catch (Throwable e) {
         e.printStackTrace();
       }
   } }

我的堆栈跟踪如下：
webaggregator.testsumwithvalidrange（webaggregator。java:62)在webaggregator.main（webaggregator。java:79)
请帮忙。