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RuntimeError: Core module unavailable. Trying to import from the source directory?

See original GitHub issue

I installed with sudo pip2.7 install pydoop. But when I try to import and test any hdfs function, I get the following runtime error:

In [11]: import pydoop.hdfs as hdfs

In [12]:"/user")
RuntimeError                              Traceback (most recent call last)
<ipython-input-12-b865d4bfdb3c> in <module>()
----> 1"/user")

/home/hadoop/manish/pydoop/pydoop/hdfs/__init__.pyc in ls(hdfs_path, user, recursive)
    319     items are hdfs paths instead of dictionaries of properties.
    320     """
--> 321     dir_list = lsl(hdfs_path, user, recursive)
    322     return [d["name"] for d in dir_list]

/home/hadoop/manish/pydoop/pydoop/hdfs/__init__.pyc in lsl(hdfs_path, user, recursive)
    298     """
    299     host, port, path_ = path.split(hdfs_path, user)
--> 300     fs = hdfs(host, port, user)
    301     if not recursive:
    302         dir_list = fs.list_directory(path_)

/home/hadoop/manish/pydoop/pydoop/hdfs/fs.pyc in __init__(self, host, port, user, groups)
    154             self.__status = self.__lookup((host, port, user))
    155         except KeyError:
--> 156             h, p, u, fs = _get_connection_info(host, port, user)
    157             aliasing_info = [] if user else [("user", u, user)]
    158             if h != "":

/home/hadoop/manish/pydoop/pydoop/hdfs/fs.pyc in _get_connection_info(host, port, user)
     72 def _get_connection_info(host, port, user):
---> 73     fs = core_hdfs_fs(host, port, user)
     74     res = urlparse(fs.get_working_directory())
     75     if res.scheme == "file":

/home/hadoop/manish/pydoop/pydoop/hdfs/core/__init__.pyc in core_hdfs_fs(host, port, user)
     43         else:
     44             msg = "Check that Pydoop is correctly installed"
---> 45         raise RuntimeError("Core module unavailable. %s" % msg)
     46     return _CORE_MODULE.CoreHdfsFs(host, port, user)

RuntimeError: Core module unavailable. Trying to import from the source directory?

By the way, I installed it in Cloudera CDH 5 distribution.

Issue Analytics

  • State:closed
  • Created 6 years ago
  • Comments:9 (4 by maintainers)

github_iconTop GitHub Comments

simleocommented, Mar 16, 2018

Your machine does not have to be part of the Hadoop cluster. It just needs to be able to connect to the cluster nodes via TCP/IP. Please refer to for details on how to configure your Hadoop cluster.

Atrbearcommented, Mar 16, 2018

THX, I think it may be the problem of the hadoop settings.

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