Hadoop 使用Python运行MapReduce流作业时出错

我正在尝试运行这个mapper和reducer代码*免责声明-培训课程解决方案的一部分

mapper.py

减速机

不断抛出此错误：

UNDEF/bin/hadoop job  -Dmapred.job.tracker=0.0.0.0:8021 -kill job_201404041914_0012
14/04/04 23:13:53 INFO streaming.StreamJob: Tracking URL: http://0.0.0.0:50030/jobdetails.jsp?jobid=job_201404041914_0012
14/04/04 23:13:53 ERROR streaming.StreamJob: Job not successful. Error: NA
14/04/04 23:13:53 INFO streaming.StreamJob: killJob...
Streaming Command Failed!

Traceback (most recent call last):
  File "r.py", line 14, in <module>
    print transactions, "\t", salesTotal
NameError: name 'transactions' is not defined

我尝试过显式调用python函数，也尝试过指定python解释器。i、 e./usr/bin/env python

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知道哪里出错了吗？

作业失败了，因为您的reducer.py有语法错误

这一行的问题在于：

print transactions, "\t", salesTotal

没有名称为transactions和salesTotal的变量

如果在本地执行，则会出现以下错误：

UNDEF/bin/hadoop job  -Dmapred.job.tracker=0.0.0.0:8021 -kill job_201404041914_0012
14/04/04 23:13:53 INFO streaming.StreamJob: Tracking URL: http://0.0.0.0:50030/jobdetails.jsp?jobid=job_201404041914_0012
14/04/04 23:13:53 ERROR streaming.StreamJob: Job not successful. Error: NA
14/04/04 23:13:53 INFO streaming.StreamJob: killJob...
Streaming Command Failed!

Traceback (most recent call last):
  File "r.py", line 14, in <module>
    print transactions, "\t", salesTotal
NameError: name 'transactions' is not defined

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Jay Setti：你能告诉你执行的命令吗？提供的信息不足以调试，请检查日志文件以获取更多信息。

print trans, "\t", sTotal