OSError: [Errno 24] Too many open files analyzing large project

[pylint-bot]

Originally reported by: BitBucket: jquast, GitHub: @jquast?

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This reported duplicated from another project, prospector-dev/prospector#73 (comment)

Reporter claims to have a fairly large project size. Is it possible there is a file descriptor leak?

Traceback (most recent call last):
  File "/usr/local/bin/prospector", line 9, in <module>
  File "/usr/local/lib/python2.7/site-packages/prospector/run.py", line 317, in main
  File "/usr/local/lib/python2.7/site-packages/prospector/run.py", line 224, in execute
  File "/usr/local/lib/python2.7/site-packages/prospector/tools/pylint/__init__.py", line 182, in run
  File "/usr/local/lib/python2.7/site-packages/pylint/lint.py", line 585, in check
  File "/usr/local/lib/python2.7/site-packages/pylint/lint.py", line 662, in check_astroid_module
  File "/usr/local/lib/python2.7/site-packages/pylint/utils.py", line 804, in walk
  File "/usr/local/lib/python2.7/site-packages/pylint/utils.py", line 801, in walk
  File "/usr/local/lib/python2.7/site-packages/pylint/checkers/variables.py", line 756, in visit_import
  File "/usr/local/lib/python2.7/site-packages/astroid/bases.py", line 110, in cache_generator
  File "/usr/local/lib/python2.7/site-packages/astroid/bases.py", line 341, in wrapped
  File "/usr/local/lib/python2.7/site-packages/astroid/inference.py", line 212, in infer_import
  File "/usr/local/lib/python2.7/site-packages/astroid/mixins.py", line 107, in do_import_module
  File "/usr/local/lib/python2.7/site-packages/astroid/scoped_nodes.py", line 361, in import_module
  File "/usr/local/lib/python2.7/site-packages/astroid/manager.py", line 125, in ast_from_module_name
OSError: [Errno 24] Too many open files

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• Bitbucket: https://bitbucket.org/logilab/astroid/issue/65

[pylint-bot]

Original comment by Claudiu Popa (BitBucket: PCManticore, GitHub: @PCManticore?):

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Indeed, it was a file descriptor leak. Not a leak per se, since the files were closed after Pylint finished analyzing the modules, but since there were already too many open files, it failed to reach that point. In 468534927b4cace0232e6659892942b291996998 I added a new way for retrieving a module's file stream, using a method, which will be used in Pylint 1.4.1 and thus the file will be closed right away. This problem should go away by then. Since the astroid part is finished, I'll close the issue, but you can reopen it if it reoccurs in Pylint 1.4.1.

[pylint-bot]

Original comment by BitBucket: jquast, GitHub: @jquast?:

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Great job, solution looks sound. Thanks for your attention!