hadoop-streaming：Python导入问题

Question

  

可能重复：
  Hadoop cluster - Do I need to replicate my code over all machines before running job?

我有一个映射器，它在隔离运行时运行正常，但是当使用hadoop命令运行时会给出 ImportError

代码：

if __name__ == '__main__':
    sys.path.append(os.path.expanduser('~/Documents/work/dw/a/src'))
    from src.utilities import utilities
    from src.utilities import PropXMLReader

    main()

当我在命令行

上运行时

>> import os, sys
>>> sys.path.append(os.path.expanduser('~/Documents/work/dw/a/'))
>>> from src.utilities import utilities
>>> 

使用hadoop运行时，我发现错误如下：

Traceback (most recent call last):
  File "/app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201110271425_0003/attempt_201110271425_0003_m_000020_0/work/./mapper.py", line 55, in <module>
    from src.utilities import utilities
ImportError: No module named src.utilities
java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
    at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:311)
    at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:545)
    at org.apache.hadoop.streaming.PipeMapper.map(PipeMapper.java:121)
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
    at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:36)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:261)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
    at org.apache.hadoop.mapred.Child.main(Child.java:255)
java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 1
    at org.apache.hadoop.streaming.PipeMapRed.waitOutputThreads(PipeMapRed.java:311)
    at org.apache.hadoop.streaming.PipeMapRed.mapRedFinished(PipeMapRed.java:545)
    at org.apache.hadoop.streaming.PipeMapper.close(PipeMapper.java:132)
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:57)
    at org.apache.hadoop.streaming.PipeMapRunner.run(PipeMapRunner.java:36)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:261)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
    at org.apache.hadoop.mapred.Child.main(Child.java:255)