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REASON: Exception: Exception: Traceback (most recent call last):
File "/home/asn/workspace/prj/oss/samba/asn-fix/bin/python/samba/tests/krb5/lockout_tests.py", line 858, in test_lockout_transaction_bad_pwd_samr_aes
self.do_lockout_transaction(connect_samr_aes, correct_pw=False)
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/asn/workspace/prj/oss/samba/asn-fix/bin/python/samba/tests/krb5/lockout_tests.py", line 990, in do_lockout_transaction
connect_future = executor.submit(
connect_fn,
...<7 lines>...
workstation=user_creds.get_workstation(),
dn=str(user_dn))
File "/usr/lib64/python3.14/concurrent/futures/process.py", line 816, in submit
self._adjust_process_count()
~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib64/python3.14/concurrent/futures/process.py", line 775, in _adjust_process_count
self._spawn_process()
~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib64/python3.14/concurrent/futures/process.py", line 793, in _spawn_process
p.start()
~~~~~~~^^
File "/usr/lib64/python3.14/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
~~~~~~~~~~~^^^^^^
File "/usr/lib64/python3.14/multiprocessing/context.py", line 300, in _Popen
return Popen(process_obj)
File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 35, in __init__
super().__init__(process_obj)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib64/python3.14/multiprocessing/popen_fork.py", line 20, in __init__
self._launch(process_obj)
~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 42, in _launch
prep_data = spawn.get_preparation_data(process_obj._name)
File "/usr/lib64/python3.14/multiprocessing/spawn.py", line 164, in get_preparation_data
_check_not_importing_main()
~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/lib64/python3.14/multiprocessing/spawn.py", line 140, in _check_not_importing_main
raise RuntimeError('''
...<16 lines>...
''')
RuntimeError:
An attempt has been made to start a new process before the
current process has finished its bootstrapping phase.
This probably means that you are not using fork to start your
child processes and you have forgotten to use the proper idiom
in the main module:
if __name__ == '__main__':
freeze_support()
...
The "freeze_support()" line can be omitted if the program
is not going to be frozen to produce an executable.
To fix this issue, refer to the "Safe importing of main module"
section in https://docs.python.org/3/library/multiprocessing.html
In Python 3.14, the default multiprocessing start method changed from fork to
forkserver/spawn. When using ProcessPoolExecutor, the code needs to
either:
1. Explicitly set the start method to fork (the simplest fix for this case)
2. Or ensure proper if __name__ == '__main__': guards (not practical for test
code run by a test framework)
The fix is to explicitly use the fork start method when creating the
ProcessPoolExecutor. This can be done by passing a mp_context parameter:
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
6b4a372fdb