ValueError: I/O operation on closed file

[pytestbot]

Originally reported by: Alfredo Deza (BitBucket: alfredodeza, GitHub: alfredodeza)

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There is a problem with the logging module and py.test

Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 1472, in shutdown
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 1472, in shutdown
    h.flush()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 740, in flush
    self.stream.flush()
    h.flush()
ValueError: I/O operation on closed file

It seems that if it runs with the '-s' flag it doesn't do this anymore.

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• Bitbucket: https://bitbucket.org/pytest-dev/pytest/issue/14

[pytestbot]

Original comment by holger krekel (BitBucket: hpk42, GitHub: hpk42):

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fix issue14 : it was actually issue14 instead of issue8 that was fixed with
the older https://bitbucket.org/hpk42/pytest/changeset/1c3eb86502b3

please try out with the usual "pip install -i http://pypi.testrun.org -U pytest"

[pytestbot]

Original comment by Adam Wagner (BitBucket: awagner83, GitHub: awagner83):

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This fixes it for me.

[pytestbot]

Original comment by Alfredo Deza (BitBucket: alfredodeza, GitHub: alfredodeza):

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I can confirm this gets fixed with the update. Sorry for not reporting it sooner...

[pytestbot]

Original comment by eduardo schettino (BitBucket: schettino72, GitHub: schettino72):

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there is still a problem with this when used with capsys...

{{{
#!python

(py26)~/work/xxx$ cat bug14.py
import logging
def test_133(capsys):
logging.error('x')

(py26)~/work/xxx$ py.test bug14.py
================================================ test session starts =================================================
platform linux2 -- Python 2.6.6 -- pytest-2.0.2
collected 1 items

bug14.py .

============================================== 1 passed in 0.01 seconds ==============================================
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "/usr/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
func(_targs, *_kargs)
File "/usr/lib/python2.6/logging/init.py", line 1516, in shutdown
h.flush()
File "/usr/lib/python2.6/logging/init.py", line 762, in flush
self.stream.flush()
File "/usr/lib/python2.6/io.py", line 1488, in flush
self.buffer.flush()
ValueError: I/O operation on closed file.
Error in sys.exitfunc:
Traceback (most recent call last):
File "/usr/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
func(_targs, *_kargs)
File "/usr/lib/python2.6/logging/init.py", line 1516, in shutdown
h.flush()
File "/usr/lib/python2.6/logging/init.py", line 762, in flush
self.stream.flush()
File "/usr/lib/python2.6/io.py", line 1488, in flush
self.buffer.flush()
ValueError: I/O operation on closed file.

}}}

[pytestbot]

Original comment by holger krekel (BitBucket: hpk42, GitHub: hpk42):

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can you quickly try with "pip install -U -i http://pypi.testrun.org pytest" which should get you 2.0.3.dev3 and fix the issue? (To be honest, i am not yet sure why it is fixed, but i'd rather first check if it works for you as well)

[pytestbot]

Original comment by Ronny Pfannschmidt (BitBucket: RonnyPfannschmidt, GitHub: RonnyPfannschmidt):

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still in trunk

[pytestbot]

Original comment by Ronny Pfannschmidt (BitBucket: RonnyPfannschmidt, GitHub: RonnyPfannschmidt):

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this would probably best be fixed by integrating logcapture into pytest

[pytestbot]

Original comment by Ronny Pfannschmidt (BitBucket: RonnyPfannschmidt, GitHub: RonnyPfannschmidt):

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as a extra note, it seems this is version specific to python2.7

[pytestbot]

Original comment by holger krekel (BitBucket: hpk42, GitHub: hpk42):

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i can't reproduce this with my py27/py33 and pytest-trunk anymore

[pytestbot]

Original comment by Alfredo Deza (BitBucket: alfredodeza, GitHub: alfredodeza):

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I am not consistently hitting this with Python 2.6

#!text

 py.test -v
================================================ test session starts =================================================
platform darwin -- Python 2.6.7 -- pytest-2.3.5 -- /Users/alfredo/python/ceph-deploy/.tox/py26/bin/python2.6
collected 28 items

tests/test_cli.py:5: test_help PASSED
tests/test_cli.py:16: test_bad_command PASSED
tests/test_cli.py:28: test_bad_cluster PASSED
tests/test_cli_install.py:13: test_help PASSED
tests/test_cli_install.py:24: test_bad_no_host PASSED
tests/test_cli_install.py:36: test_simple PASSED
tests/test_cli_mon.py:13: test_help PASSED
tests/test_cli_mon.py:24: test_bad_no_conf PASSED
tests/test_cli_mon.py:36: test_bad_no_mon PASSED
tests/test_cli_mon.py:50: test_simple PASSED
tests/test_cli_new.py:13: test_help PASSED
tests/test_cli_new.py:24: test_write_global_conf_section PASSED
tests/test_cli_new.py:49: test_uuid PASSED
tests/test_cli_new.py:67: test_mons PASSED
tests/test_cli_new.py:73: test_defaults PASSED
tests/test_cli_osd.py:13: test_help PASSED
tests/test_cli_osd.py:24: test_bad_no_conf PASSED
tests/test_cli_osd.py:36: test_bad_no_disk PASSED
tests/test_cli_osd.py:49: test_simple PASSED
tests/test_conf.py:5: test_simple PASSED
tests/test_conf.py:14: test_indent_space PASSED
tests/test_conf.py:23: test_indent_tab PASSED
tests/test_conf.py:32: test_words_underscore PASSED
tests/test_conf.py:42: test_words_space PASSED
tests/test_conf.py:52: test_words_many PASSED
tests/test_mon.py:30: TestCatchCommonErrors.test_warn_if_no_intial_members PASSED
tests/test_mon.py:36: TestCatchCommonErrors.test_warn_if_not_mon_in_monmap PASSED
tests/test_mon.py:42: TestCatchCommonErrors.test_warn_if_not_public_addr_and_not_public_netw PASSED

============================================= 28 passed in 2.81 seconds ==============================================
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 1516, in shutdown
    h.flush()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 762, in flush
    self.stream.flush()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/io.py", line 1488, in flush
    self.buffer.flush()
ValueError: I/O operation on closed file.
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 1516, in shutdown
    h.flush()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/logging/__init__.py", line 762, in flush
    self.stream.flush()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/io.py", line 1488, in flush
    self.buffer.flush()
ValueError: I/O operation on closed file.

This only happens if I use capsys. As soon as I stop using it the error goes away.

[jfitzpatrick99]

I am hitting this with pytest 2.7.2 and python 2.7.2. The issue seems to occur if the logger I use is instantiated at the module level instead of inside a module function.

[nicoddemus]

Hi @jfitzpatrick99, can you provide a small example which reproduces the problem?

[jfitzpatrick99]

@nicoddemus I just tried putting together a small reproducer but at the moment I can only reproduce with my entire application. I will see if I can get something together for tomorrow.