Hbase 减速器不适用于蜂箱

我正在使用cdh3u5沥青球。我已经创建了用于查询Hbase的配置单元外部表。我可以像这样执行简单的选择查询

select * from hbase_tab;

但当查询使用映射器和reducer时，它就失败了。这是我得到的

hive> select count(*) from hbase_tab;
                                                                                                                           Total MapReduce jobs = 1
    Launching Job 1 out of 1
    Number of reduce tasks determined at compile time: 1
    In order to change the average load for a reducer (in bytes):
      set hive.exec.reducers.bytes.per.reducer=<number>
    In order to limit the maximum number of reducers:
      set hive.exec.reducers.max=<number>
    In order to set a constant number of reducers:
      set mapred.reduce.tasks=<number>
    Starting Job = job_201211121409_0030, Tracking URL = http://10.3.3.333:50030/jobdetails.jsp?jobid=job_201211121409_030
    Kill Command = /home/hadoop/hadoop/bin/hadoop job  -Dmapred.job.tracker=10.3.3.333:9001 -kill job_201211121409_030
    2012-11-21 10:19:28,150 Stage-1 map = 0%,  reduce = 0%
    2012-11-21 10:20:03,564 Stage-1 map = 100%,  reduce = 100%
    Ended Job = job_201211121409_0030 with errors
    FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.MapRedTask

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但我也面临着同样的问题。请引导我，因为我是新来的。提前谢谢。

您能告诉我您的日志中有什么内容吗？？需要详细的错误谢谢nicole问题现在解决了再次谢谢。

set hive.exec.reducers.bytes.per.reducer=<number>
set hive.exec.reducers.max=<number>
set mapred.reduce.tasks=<number>