如何解决在 bitbucket 管道中通过 xdist 并行运行 pytest 的错误

Question

我们在 bitbucket 管道中为我们的 python 存储库执行单元测试。最近我们开始使用 pytest-xdist (https://pypi.org/project/pytest-xdist/) 包，并在通过coverage run -m pytest -n auto 命令在本地运行时成功地并行运行了我们的单元测试。这将在我们本地机器上的所有可用 CPU 上执行所有单元测试。但是，当我们通过 bitbucket 管道使用相同的命令运行测试时，我们会遇到以下异常。关于如何解决这个问题有什么建议吗？

+ coverage run -m pytest -n auto
============================= test session starts ==============================
platform linux -- Python 3.7.5, pytest-5.4.3, py-1.10.0, pluggy-0.13.1
rootdir: /opt/atlassian/pipelines/agent/build
plugins: celery-4.4.7, forked-1.3.0, xdist-2.2.1, mock-3.5.1
gw0 I / gw1 I / gw2 I / gw3 I
INTERNALERROR> def worker_internal_error(self, node, formatted_error):
INTERNALERROR>         """
INTERNALERROR>         pytest_internalerror() was called on the worker.
INTERNALERROR>     
INTERNALERROR>         pytest_internalerror() arguments are an excinfo and an excrepr, which can't
INTERNALERROR>         be serialized, so we go with a poor man's solution of raising an exception
INTERNALERROR>         here ourselves using the formatted message.
INTERNALERROR>         """
INTERNALERROR>         self._active_nodes.remove(node)
INTERNALERROR>         try:
INTERNALERROR> >           assert False, formatted_error
INTERNALERROR> E           AssertionError: Traceback (most recent call last):
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 191, in wrap_session
INTERNALERROR> E                 session.exitstatus = doit(config, session) or 0
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 246, in _main
INTERNALERROR> E                 config.hook.pytest_collection(session=session)
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/hooks.py", line 286, in __call__
INTERNALERROR> E                 return self._hookexec(self, self.get_hookimpls(), kwargs)
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/manager.py", line 93, in _hookexec
INTERNALERROR> E                 return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/manager.py", line 87, in <lambda>
INTERNALERROR> E                 firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 208, in _multicall
INTERNALERROR> E                 return outcome.get_result()
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
INTERNALERROR> E                 raise ex[1].with_traceback(ex[2])
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
INTERNALERROR> E                 res = hook_impl.function(*args)
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 257, in pytest_collection
INTERNALERROR> E                 return session.perform_collect()
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 453, in perform_collect
INTERNALERROR> E                 self.config.pluginmanager.check_pending()
INTERNALERROR> E               File "/usr/local/lib/python3.7/site-packages/pluggy/manager.py", line 277, in check_pending
INTERNALERROR> E                 % (name, hookimpl.plugin),
INTERNALERROR> E             pluggy.manager.PluginValidationError: unknown hook 'pytest_warning_recorded' in plugin <__channelexec__.WorkerInteractor object at 0x7f11772d84d0>
INTERNALERROR> E           assert False
INTERNALERROR> 
INTERNALERROR> /usr/local/lib/python3.7/site-packages/xdist/dsession.py:187: AssertionError
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 191, in wrap_session
INTERNALERROR>     session.exitstatus = doit(config, session) or 0
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/_pytest/main.py", line 247, in _main
INTERNALERROR>     config.hook.pytest_runtestloop(session=session)
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/hooks.py", line 286, in __call__
INTERNALERROR>     return self._hookexec(self, self.get_hookimpls(), kwargs)
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/manager.py", line 93, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/manager.py", line 87, in <lambda>
INTERNALERROR>     firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 208, in _multicall
INTERNALERROR>     return outcome.get_result()
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
INTERNALERROR>     raise ex[1].with_traceback(ex[2])
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/xdist/dsession.py", line 112, in pytest_runtestloop
INTERNALERROR>     self.loop_once()
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/xdist/dsession.py", line 135, in loop_once
INTERNALERROR>     call(**kwargs)
INTERNALERROR>   File "/usr/local/lib/python3.7/site-packages/xdist/dsession.py", line 175, in worker_workerfinished
INTERNALERROR>     self._active_nodes.remove(node)
INTERNALERROR> KeyError: <WorkerController gw0>

提前感谢您的帮助！

Answer 1

我遇到了同样的问题，但是在将 pytest 升级到 6.2.2 后我无法解决这个问题

Answer 2

发现问题！ 我正在使用旧版本的 pytest 运行。将最新版本的 pytest（在撰写本文时是 pytest==6.2.2 到我的 requirements.txt 解决了这个问题。随后的问题是 more-itertools 包没有内置到我拥有的 bitbucket 管道容器的 python 环境中如此配置，因此也将其固定到要求