如何在EMR上运行mrjob

Question

我试图通过遵循这教程来运行mapreduce。

我将mrjob.conf、readme.txt和word_count.py文件上传到了~/hello_mapreduce文件夹中的EC2实例中，并尝试运行以下命令：

python word_count.py -r电子病历README.txt

其中返回了以下内容：

no configs found; falling back on auto-configuration
no configs found; falling back on auto-configuration
Traceback (most recent call last):
  File "word_count.py", line 21, in <module>
    MRWordFrequencyCount.run()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/job.py", line 494, in run
    mr_job.execute()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/job.py", line 512, in execute
    super(MRJob, self).execute()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/launch.py", line 147, in execute
    self.run_job()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/launch.py", line 207, in run_job
    with self.make_runner() as runner:
  File "/usr/local/lib/python2.7/dist-packages/mrjob/job.py", line 535, in make_runner
    return super(MRJob, self).make_runner()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/launch.py", line 162, in make_runner
    return EMRJobRunner(**self.emr_job_runner_kwargs())
  File "/usr/local/lib/python2.7/dist-packages/mrjob/emr.py", line 579, in __init__
    self._fix_s3_scratch_and_log_uri_opts()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/emr.py", line 664, in _fix_s3_scratch_and_log_uri_opts
    s3_conn = self.make_s3_conn()
  File "/usr/local/lib/python2.7/dist-packages/mrjob/fs/s3.py", line 226, in make_s3_conn
    host=self._s3_endpoint)
  File "/usr/lib/python2.7/dist-packages/boto/__init__.py", line 108, in connect_s3
    return S3Connection(aws_access_key_id, aws_secret_access_key, **kwargs)
  File "/usr/lib/python2.7/dist-packages/boto/s3/connection.py", line 154, in __init__
    suppress_consec_slashes=suppress_consec_slashes)
  File "/usr/lib/python2.7/dist-packages/boto/connection.py", line 486, in __init__
    host, config, self.provider, self._required_auth_capability())
  File "/usr/lib/python2.7/dist-packages/boto/auth.py", line 406, in get_auth_handler
    'Check your credentials' % (len(names), str(names)))
boto.exception.NoAuthHandlerFound: No handler was ready to authenticate. 1 handlers were checked. ['HmacAuthV1Handler'] Check your credentials

我可能错了，但我猜可能/主要的问题是文件mrjob.conf是不可见的，但不知道原因。

mrjob.conf的内容如下：

runners:
  emr:
    aws_access_key_id: xxxxx
    aws_secret_access_key: xxxxxxxxxx

    ec2_key_pair: EMR
    ec2_key_pair_file: ~/.ssh/EMR.pem # ~/ and $ENV_VARS allowed here
    ssh_tunnel_to_job_tracker: true

作为AWS用户新手，如果有人能帮助解决这个问题，我将非常感激，这样就可以成功地使用mrjob和AWS运行mapreduce。

谢谢!

Answer 1

解决了。

我使用命令(显式定义的位置)运行作业：

 python word_count.py -r emr readme.txt --conf-path mrjob.conf

并且从.conf文件中删除了用于建立ssh连接的行：

runners:
  emr:
    aws_access_key_id: xxxxx
    aws_secret_access_key: xxxxxxxxxx