全部，
我正在尝试使用thrift library for python在python脚本中运行配置单元查询。我可以运行不执行m/r的查询 create table ，和 select * from table 但是当我执行执行m/r作业的查询时（比如 select * from table where... )，我得到以下异常。

starting hive server...

Hive history file=/tmp/root/hive_job_log_root_201212171354_275968533.txt
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>
java.net.ConnectException: Call to sp-rhel6-01/172.22.193.79:54311 failed on connection exception: java.net.ConnectException: Connection refused

Job Submission failed with exception 'java.net.ConnectException(Call to sp-rhel6-01/172.22.193.79:54311 failed on connection exception: java.net.ConnectException: Connection refused)'
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask

我有一个多节点hadoop集群，我的配置单元安装在namenode中，我也在同一个namenode上运行python脚本。
python脚本是

from hive_service import ThriftHive
from thrift import Thrift
from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol

transport = TSocket.TSocket('172.22.193.79', 10000)
transport = TTransport.TBufferedTransport(transport)
protocol = TBinaryProtocol.TBinaryProtocol(transport)

client = ThriftHive.Client(protocol)
transport.open()

client.execute("select count(*) from example ")
print client.fetchAll();
transport.close()

有人能帮我理解出了什么问题吗？
-苏珊特