New submission from Oleksandr Buchkovskyi <olex.buchkov...@gmail.com>:
the problem is reproduced on big multiprocessing.Process output when the size of the output gets bigger than signed int a struct error is raised ``` python3 test.py Process ForkPoolWorker-1: Traceback (most recent call last): File "/usr/lib64/python3.5/multiprocessing/pool.py", line 125, in worker put((job, i, result)) File "/usr/lib64/python3.5/multiprocessing/queues.py", line 347, in put self._writer.send_bytes(obj) File "/usr/lib64/python3.5/multiprocessing/connection.py", line 200, in send_bytes self._send_bytes(m[offset:offset + size]) File "/usr/lib64/python3.5/multiprocessing/connection.py", line 393, in _send_bytes header = struct.pack("!i", n) struct.error: 'i' format requires -2147483648 <= number <= 2147483647 During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib64/python3.5/multiprocessing/process.py", line 252, in _bootstrap self.run() File "/usr/lib64/python3.5/multiprocessing/process.py", line 93, in run self._target(*self._args, **self._kwargs) File "/usr/lib64/python3.5/multiprocessing/pool.py", line 130, in worker put((job, i, (False, wrapped))) File "/usr/lib64/python3.5/multiprocessing/queues.py", line 347, in put self._writer.send_bytes(obj) File "/usr/lib64/python3.5/multiprocessing/connection.py", line 200, in send_bytes self._send_bytes(m[offset:offset + size]) File "/usr/lib64/python3.5/multiprocessing/connection.py", line 393, in _send_bytes header = struct.pack("!i", n) struct.error: 'i' format requires -2147483648 <= number <= 2147483647 ``` this error can be fixed by changing types that are used herŅ for struct.pack/unpack to !Q ---------- components: Library (Lib) files: error_on_bug_multiprocessing_output.py messages: 329189 nosy: ahcub priority: normal severity: normal status: open title: too small type for struct.pack/unpack in mutliprocessing.Connection type: crash versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8 Added file: https://bugs.python.org/file47903/error_on_bug_multiprocessing_output.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue35152> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com