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pytest-xdist appears to fail on Python 3.5 #1007

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Lukasa opened this issue Sep 15, 2015 · 4 comments
Closed

pytest-xdist appears to fail on Python 3.5 #1007

Lukasa opened this issue Sep 15, 2015 · 4 comments

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@Lukasa
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Lukasa commented Sep 15, 2015

OS: Mac OS X 10.11 El Capitan GM
Python: 3.5.0, from pyenv
py.test version: 2.7.3

I'm testing a project on Python 3.5 with pytest-xdist, pytest-cov, and hypothesis-pytest. Using pytest-xdist is causing unexpected breakages on Python 3.5 only: no problems are encountered in other pythons, or if I disable pytest-xdist.

Below is the successful output from running py.test test/:

(py35)cory@corymbp:hyper-h2/ % py.test test/
============================= test session starts ==============================
platform darwin -- Python 3.5.0 -- py-1.4.30 -- pytest-2.7.3
rootdir: /Users/cory/Documents/Python/hyper-h2, inifile: 
plugins: hypothesis-pytest, cov, xdist, xdist, xdist
collected 96 items 

test/test_basic_logic.py .....................................................................................
test/test_events.py ...
test/test_invalid_frame_sequences.py ..
test/test_state_machines.py ......

========================== 96 passed in 2.07 seconds ===========================

Below is the unsuccessful output from running py.test -n 4 test/ (truncated because it just repeats forever):

============================ test session starts ==============================
platform darwin -- Python 3.5.0 -- py-1.4.30 -- pytest-2.7.3
rootdir: /Users/cory/Documents/Python/hyper-h2, inifile: 
plugins: hypothesis-pytest, cov, xdist, xdist, xdist
gw0 C / gw1 C / gw2 C / gw3 C[gw0] node down: Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 371, in __getattr__
    return cls._member_map_[name]
KeyError: '_convert'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/execnet/gateway_base.py", line 1072, in executetask
    do_exec(co, loc)  # noqa
  File "<string>", line 1, in do_exec
  File "<remote exec>", line 143, in <module>
  File "<remote exec>", line 120, in remote_initconfig
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 673, in fromdictargs
    pluginmanager = get_plugin_manager()
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 332, in import_plugin
    self.register(mod, modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 189, in register
    reg(plugin, name)  # may call addhooks
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 612, in _register_plugin
    import pytest
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/pytest.py", line 17, in <module>
    _preloadplugins() # to populate pytest.* namespace so help(pytest) works
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 58, in _preloadplugins
    _preinit.append(get_plugin_manager())
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 318, in import_plugin
    mod = importplugin(modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 367, in importplugin
    __import__(mod)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/pdb.py", line 3, in <module>
    import pdb
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/pdb.py", line 78, in <module>
    import signal
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/signal.py", line 8, in <module>
    _IntEnum._convert(
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 373, in __getattr__
    raise AttributeError(name)
AttributeError: _convert

Replacing crashed slave gw0
gw4 C / gw1 C / gw2 C / gw3 C[gw1] node down: Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 371, in __getattr__
    return cls._member_map_[name]
KeyError: '_convert'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/execnet/gateway_base.py", line 1072, in executetask
    do_exec(co, loc)  # noqa
  File "<string>", line 1, in do_exec
  File "<remote exec>", line 143, in <module>
  File "<remote exec>", line 120, in remote_initconfig
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 673, in fromdictargs
    pluginmanager = get_plugin_manager()
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 332, in import_plugin
    self.register(mod, modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 189, in register
    reg(plugin, name)  # may call addhooks
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 612, in _register_plugin
    import pytest
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/pytest.py", line 17, in <module>
    _preloadplugins() # to populate pytest.* namespace so help(pytest) works
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 58, in _preloadplugins
    _preinit.append(get_plugin_manager())
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 318, in import_plugin
    mod = importplugin(modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 367, in importplugin
    __import__(mod)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/pdb.py", line 3, in <module>
    import pdb
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/pdb.py", line 78, in <module>
    import signal
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/signal.py", line 8, in <module>
    _IntEnum._convert(
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 373, in __getattr__
    raise AttributeError(name)
AttributeError: _convert

Replacing crashed slave gw1
gw4 C / gw5 C / gw2 C / gw3 C[gw2] node down: Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 371, in __getattr__
    return cls._member_map_[name]
KeyError: '_convert'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/execnet/gateway_base.py", line 1072, in executetask
    do_exec(co, loc)  # noqa
  File "<string>", line 1, in do_exec
  File "<remote exec>", line 143, in <module>
  File "<remote exec>", line 120, in remote_initconfig
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 673, in fromdictargs
    pluginmanager = get_plugin_manager()
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 332, in import_plugin
    self.register(mod, modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 189, in register
    reg(plugin, name)  # may call addhooks
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 612, in _register_plugin
    import pytest
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/pytest.py", line 17, in <module>
    _preloadplugins() # to populate pytest.* namespace so help(pytest) works
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 58, in _preloadplugins
    _preinit.append(get_plugin_manager())
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/config.py", line 67, in get_plugin_manager
    pluginmanager.import_plugin(spec)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 318, in import_plugin
    mod = importplugin(modname)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/core.py", line 367, in importplugin
    __import__(mod)
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/_pytest/pdb.py", line 3, in <module>
    import pdb
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/pdb.py", line 78, in <module>
    import signal
  File "/Users/cory/.pyenv/versions/3.5.0/lib/python3.5/signal.py", line 8, in <module>
    _IntEnum._convert(
  File "/Users/cory/Documents/Python/hyper-h2/.tox/py35/lib/python3.5/site-packages/enum/__init__.py", line 373, in __getattr__
    raise AttributeError(name)
AttributeError: _convert

Here is the output from pip freeze:

py35)cory@corymbp:hyper-h2/ % pip freeze                  baefbec|master✓ [5m]
apipkg==1.4
coverage==3.7.1
enum34==1.0.4
execnet==1.4.1
h2==0.1.0
hpack==1.1.0
hyperframe==1.1.1
hypothesis==1.11.0
hypothesis-pytest==0.18.1
py==1.4.30
pytest==2.7.3
pytest-cov==2.1.0
pytest-xdist==1.13.1
wheel==0.24.0
@RonnyPfannschmidt
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please uninstall the enum34 pacakge, which breaks any python that has enum and try again

@Lukasa
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Lukasa commented Sep 15, 2015

@RonnyPfannschmidt Hmm. That does appear to be the problem. Thanks!

Out of curiosity, why doesn't it affect Python 3.4?

cory@corymbp:hyper-h2/ % . .tox/py34/bin/activate
(py34)cory@corymbp:hyper-h2/ % pip freeze
apipkg==1.4
coverage==3.7.1
enum34==1.0.4
execnet==1.4.1
h2==0.1.0
hpack==1.1.0
hyperframe==1.1.1
hypothesis==1.11.0
hypothesis-pytest==0.18.1
py==1.4.30
pytest==2.7.3
pytest-cov==2.1.0
pytest-xdist==1.13.1
wheel==0.24.0
(py34)cory@corymbp:hyper-h2/ % py.test -n 4 test/
============================= test session starts ==============================
platform darwin -- Python 3.4.3 -- py-1.4.30 -- pytest-2.7.3
rootdir: /Users/cory/Documents/Python/hyper-h2, inifile: 
plugins: hypothesis-pytest, cov, xdist, xdist, xdist
gw0 [97] / gw1 [97] / gw2 [97] / gw3 [97]
scheduling tests via LoadScheduling
.................................................................................................
========================== 97 passed in 2.86 seconds ===========================

@Lukasa Lukasa closed this as completed Sep 15, 2015
@RonnyPfannschmidt
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most likely because its the same code

@Lukasa
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Lukasa commented Sep 15, 2015

@RonnyPfannschmidt Seems like a compelling theory. Thanks again, sorry for taking up your time!

@pytestbot pytestbot mentioned this issue Apr 28, 2018
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@RonnyPfannschmidt @Lukasa