[BUG]: nox -s tests -- -DCMAKE_BUILD_TYPE=Debug -DDOWNLOAD_EIGEN=OFF failed about pybind11@master on centos8_aarch64

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What version (or hash if on master) of pybind11 are you using?

master

Problem description

[root@bigdata spack-src]# nox -s tests -- -DCMAKE_BUILD_TYPE=Debug -DDOWNLOAD_EIGEN=OFF
……
____________________________________________________________________________ test_run_in_process_direct[_intentional_deadlock] ____________________________________________________________________________

test_fn = <function _intentional_deadlock at 0xffff79cf59d0>

    @pytest.mark.parametrize("test_fn", ALL_BASIC_TESTS_PLUS_INTENTIONAL_DEADLOCK)
    def test_run_in_process_direct(test_fn):
        """Makes sure there is no GIL deadlock when using processes.

        This test is for completion, but it was never an issue.
        """
>       assert _run_in_process(test_fn) == 0

test_fn    = <function _intentional_deadlock at 0xffff79cf59d0>

../../../../tests/test_gil_scoped.py:244:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
../../../../tests/test_gil_scoped.py:161: in _run_in_process
    process.start()
        args       = ()
        kwargs     = {}
        process    = <Process name='Process-72' parent=3362301 initial daemon>
        t_start    = 1672728059.3542063
        target     = <function _intentional_deadlock at 0xffff79cf59d0>
        test_fn    = <function _intentional_deadlock at 0xffff79cf59d0>
        timeout    = 0.1
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/process.py:121: in start
    self._popen = self._Popen(self)
        self       = <Process name='Process-72' parent=3362301 initial daemon>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/context.py:224: in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
        process_obj = <Process name='Process-72' parent=3362301 initial daemon>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/context.py:291: in _Popen
    return Popen(process_obj)
        Popen      = <class 'multiprocessing.popen_forkserver.Popen'>
        process_obj = <Process name='Process-72' parent=3362301 initial daemon>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/popen_forkserver.py:35: in __init__
    super().__init__(process_obj)
        __class__  = <class 'multiprocessing.popen_forkserver.Popen'>
        process_obj = <Process name='Process-72' parent=3362301 initial daemon>
        self       = <multiprocessing.popen_forkserver.Popen object at 0xffff79213eb0>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/popen_fork.py:19: in __init__
    self._launch(process_obj)
        process_obj = <Process name='Process-72' parent=3362301 initial daemon>
        self       = <multiprocessing.popen_forkserver.Popen object at 0xffff79213eb0>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/popen_forkserver.py:51: in _launch
    self.sentinel, w = forkserver.connect_to_new_process(self._fds)
        buf        = <_io.BytesIO object at 0xffffa0695220>
        prep_data  = {'authkey': b'\x84\x94\x02$\xf7\x99\xaf<:tl\xccor%\t\xf1_&\xc5\xf7W\xe0\xab\xcf5\x82C>\xc1\x8a\xfd', 'dir': '/home/sta...r5rgfkal5y2/spack-src/.nox/tests-3-8/tmp/tests', 'init_main_from_name': 'pytest.__main__', 'log_to_stderr': False, ...}
        process_obj = <Process name='Process-72' parent=3362301 initial daemon>
        self       = <multiprocessing.popen_forkserver.Popen object at 0xffff79213eb0>
/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/forkserver.py:84: in connect_to_new_process
    self.ensure_running()
        fds        = []
        self       = <multiprocessing.forkserver.ForkServer object at 0xffff7995fd60>
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <multiprocessing.forkserver.ForkServer object at 0xffff7995fd60>

    def ensure_running(self):
        '''Make sure that a fork server is running.

        This can be called from any process.  Note that usually a child
        process will just reuse the forkserver started by its parent, so
        ensure_running() will do nothing.
        '''
        with self._lock:
            resource_tracker.ensure_running()
            if self._forkserver_pid is not None:
                # forkserver was launched before, is it still running?
                pid, status = os.waitpid(self._forkserver_pid, os.WNOHANG)
                if not pid:
                    # still alive
                    return
                # dead, launch it again
                os.close(self._forkserver_alive_fd)
                self._forkserver_address = None
                self._forkserver_alive_fd = None
                self._forkserver_pid = None

            cmd = ('from multiprocessing.forkserver import main; ' +
                   'main(%d, %d, %r, **%r)')

            if self._preload_modules:
                desired_keys = {'main_path', 'sys_path'}
                data = spawn.get_preparation_data('ignore')
                data = {x: y for x, y in data.items() if x in desired_keys}
            else:
                data = {}

            with socket.socket(socket.AF_UNIX) as listener:
                address = connection.arbitrary_address('AF_UNIX')
>               listener.bind(address)
E               OSError: AF_UNIX path too long

address    = '/home/stage/root/spack-stage-py-pybind11-master-buhdtf3eegctgi7bjpxzrr5rgfkal5y2/spack-src/.nox/tests-3-8/tmp/pymp-2y6zv958/listener-xwlet19c'
cmd        = 'from multiprocessing.forkserver import main; main(%d, %d, %r, **%r)'
data       = {'sys_path': ['/home/stage/root/spack-stage-py-pybind11-master-buhdtf3eegctgi7bjpxzrr5rgfkal5y2/spack-src/tests', '/ho.../spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python38.zip', ...]}
desired_keys = {'main_path', 'sys_path'}
listener   = <socket.socket [closed] fd=-1, family=AddressFamily.AF_UNIX, type=SocketKind.SOCK_STREAM, proto=0>
self       = <multiprocessing.forkserver.ForkServer object at 0xffff7995fd60>

/home/spack/opt/spack/linux-centos8-aarch64/gcc-8.5.0/python-3.8.8-m3k3pvne56yo7wyd7a3bwf7mugupszik/lib/python3.8/multiprocessing/forkserver.py:138: OSError
========================================================================================= short test summary info =========================================================================================
SKIPPED [1] ../../../../tests/test_builtin_casters.py:145: no <string_view>
SKIPPED [1] ../../../../tests/test_callbacks.py:203: Current PYBIND11_INTERNALS_VERSION too low
SKIPPED [1] ../../../../tests/test_copy_move.py:77: no <optional>
SKIPPED [1] ../../../../tests/test_sequences_and_iterators.py:13: no <optional>
SKIPPED [1] ../../../../tests/test_stl.py:111: no <optional>
SKIPPED [1] ../../../../tests/test_stl.py:143: no <experimental/optional>
SKIPPED [1] ../../../../tests/test_stl.py:175: no <boost/optional>
SKIPPED [1] ../../../../tests/test_stl.py:234: no <filesystem>
SKIPPED [1] ../../../../tests/test_stl.py:253: no <variant>
SKIPPED [1] ../../../../tests/test_stl.py:270: no std::monostate
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_callback_py_obj] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_callback_std_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_callback_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_callback_pure_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_inner_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_inner_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_inner_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_inner_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_nested_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_nested_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_nested_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_cross_module_gil_nested_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_release_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_nested_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[test_multi_acquire_release_cross_module] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_one_thread[_intentional_deadlock] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_callback_py_obj] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_callback_std_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_callback_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_callback_pure_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_inner_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_inner_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_inner_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_inner_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_nested_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_nested_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_nested_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_cross_module_gil_nested_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_release_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_nested_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[test_multi_acquire_release_cross_module] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_parallel[_intentional_deadlock] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_callback_py_obj] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_callback_std_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_callback_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_callback_pure_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_inner_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_inner_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_inner_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_inner_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_nested_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_nested_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_nested_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_cross_module_gil_nested_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_release_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_nested_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[test_multi_acquire_release_cross_module] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_multiple_threads_sequential[_intentional_deadlock] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_callback_py_obj] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_callback_std_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_callback_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_callback_pure_virtual_func] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_inner_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_inner_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_inner_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_inner_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_nested_custom_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_nested_custom_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_nested_pybind11_released] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_cross_module_gil_nested_pybind11_acquired] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_release_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_nested_acquire] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[test_multi_acquire_release_cross_module] - OSError: AF_UNIX path too long
FAILED ../../../../tests/test_gil_scoped.py::test_run_in_process_direct[_intentional_deadlock] - OSError: AF_UNIX path too long
=============================================================================== 72 failed, 711 passed, 10 skipped in 28.18s ===============================================================================
gmake[3]: *** [tests/CMakeFiles/pytest.dir/build.make:74: tests/CMakeFiles/pytest] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:385: tests/CMakeFiles/pytest.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:450: tests/CMakeFiles/check.dir/rule] Error 2
gmake: *** [Makefile:274: check] Error 2
nox > Command cmake --build .nox/tests-3-8/tmp --config=Release --target check failed with exit code 2
nox > Session tests-3.8 failed.
nox > Running session tests-3.9
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-3.9 skipped: Python interpreter 3.9 not found.
nox > Running session tests-3.10
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-3.10 skipped: Python interpreter 3.10 not found.
nox > Running session tests-3.11
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-3.11 skipped: Python interpreter 3.11 not found.
nox > Running session tests-pypy3.7
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-pypy3.7 skipped: Python interpreter pypy3.7 not found.
nox > Running session tests-pypy3.8
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-pypy3.8 skipped: Python interpreter pypy3.8 not found.
nox > Running session tests-pypy3.9
nox > Missing interpreters will error by default on CI systems.
nox > Session tests-pypy3.9 skipped: Python interpreter pypy3.9 not found.
nox > Ran multiple sessions:
nox > * tests-3.8: failed
nox > * tests-3.9: skipped
nox > * tests-3.10: skipped
nox > * tests-3.11: skipped
nox > * tests-pypy3.7: skipped
nox > * tests-pypy3.8: skipped
nox > * tests-pypy3.9: skipped

Reproducible example code

No response

Is this a regression? Put the last known working version here if it is.

Not a regression

Start by running nox -s tests -- -DCMAKE_BUILD_TYPE=Debug -DDOWNLOAD_EIGEN=OFF on the reported CentOS 8 AArch64 setup. Inspect tests/test_gil_scoped.py, especially _run_in_process and the failing process tests, alongside the AF_UNIX path too long traceback. Done means the affected tests complete successfully without this socket-path failure.